Adding base tool build for Linux ARM (microsoft#362)

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docs](https://github.com/microsoft/mu/blob/master/CONTRIBUTING.md) prior
to submitting the pull request. In particular,
[pull request
guidelines](https://github.com/microsoft/mu/blob/master/CONTRIBUTING.md#pull-request-best-practices).

This change added the build script to cross compile the base tool
binaries for Linux ARM system.

The needed libuuid system library is pulled from source file and rebuilt
to support the corresponding library dependencies. Individual tools'
makefiles are also updated to link the cross compiled library as well.

This is the first step of
microsoft#369.

For each item, place an "x" in between `[` and `]` if true. Example:
`[x]`.
_(you can also check items in the GitHub UI)_

- [x] Impacts functionality?
- **Functionality** - Does the change ultimately impact how firmware
functions?
- Examples: Add a new library, publish a new PPI, update an algorithm,
...
- [ ] Impacts security?
- **Security** - Does the change have a direct security impact on an
application,
    flow, or firmware?
  - Examples: Crypto algorithm change, buffer overflow fix, parameter
    validation improvement, ...
- [ ] Breaking change?
- **Breaking change** - Will anyone consuming this change experience a
break
    in build or boot behavior?
- Examples: Add a new library class, move a module to a different repo,
call
    a function in a new library class in a pre-existing module, ...
- [ ] Includes tests?
  - **Tests** - Does the change include any explicit test code?
  - Examples: Unit tests, integration tests, robot tests, ...
- [ ] Includes documentation?
- **Documentation** - Does the change contain explicit documentation
additions
    outside direct code modifications (and comments)?
- Examples: Update readme file, add feature readme file, link to
documentation
    on an a separate Web page, ...

This was tested functional on Linux ARM host system building QEMU
virtual platforms (Q35 and SBSA).

Update the basetool nuget version, once it is published.

BaseTools/Source/C/DevicePath/GNUmakefile

@@ -30,6 +30,12 @@ ifeq ($(CYGWIN), CYGWIN)
 endif
 
 ifeq ($(LINUX), Linux)
+# MU_CHANGE STARTs: Support cross compiling
+ifndef CROSS_LIB_UUID
   LIBS += -luuid
+else
+  LIBS += -L$(CROSS_LIB_UUID)
+endif
+# MU_CHANGE ENDs
 endif
 

BaseTools/Source/C/GenFv/GNUmakefile

@@ -14,6 +14,17 @@ include $(MAKEROOT)/Makefiles/app.makefile
 
 LIBS = -lCommon
 ifeq ($(CYGWIN), CYGWIN)
-  LIBS += -L/lib/e2fsprogs
+  LIBS += -L/lib/e2fsprogs -luuid
+endif
+
+ifeq ($(LINUX), Linux)
+# MU_CHANGE STARTs: Support cross compiling
+ifndef CROSS_LIB_UUID
+  LIBS += -luuid
+else
+  LIBS += -L$(CROSS_LIB_UUID)
+  BUILD_CFLAGS += -D__CROSS_LIB_UUID__ -I $(CROSS_LIB_UUID_INC)
+endif
+# MU_CHANGE ENDs
 endif
 

BaseTools/Source/C/GenFv/GenFvInternalLib.c

@@ -14,6 +14,17 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 // Include files
 //
 
+#if defined(__FreeBSD__)
+#include <uuid.h>
+#elif defined(__GNUC__)
+// MU_CHANGE STARTs: Support cross compiling
+#if !defined(__CROSS_LIB_UUID__)
+#include <uuid/uuid.h>
+#else
+#include <uuid.h>
+#endif
+// MU_CHANGE ENDs
+#endif
 #ifdef __GNUC__
 #include <sys/stat.h>
 #endif
@@ -2286,7 +2297,6 @@ Routine Description:
   bSecCore |= 0x6F; //JAL opcode
 
   memcpy(FvImage->FileImage, &bSecCore, sizeof(bSecCore));
-
   return EFI_SUCCESS;
 }
 

BaseTools/Source/C/GenFw/GNUmakefile

@@ -18,6 +18,12 @@ ifeq ($(CYGWIN), CYGWIN)
 endif
 
 ifeq ($(LINUX), Linux)
+# MU_CHANGE STARTs: Support cross compiling
+ifndef CROSS_LIB_UUID
   LIBS += -luuid
+else
+  LIBS += -L$(CROSS_LIB_UUID)
+endif
+# MU_CHANGE ENDs
 endif
 

BaseTools/Source/C/GenSec/GNUmakefile

@@ -18,6 +18,12 @@ ifeq ($(CYGWIN), CYGWIN)
 endif
 
 ifeq ($(LINUX), Linux)
+# MU_CHANGE STARTs: Support cross compiling
+ifndef CROSS_LIB_UUID
   LIBS += -luuid
+else
+  LIBS += -L$(CROSS_LIB_UUID)
+endif
+# MU_CHANGE ENDs
 endif
 

BaseTools/Source/C/Makefiles/header.makefile

@@ -54,11 +54,13 @@ AS ?= $(CLANG_BIN)clang
 AR ?= $(CLANG_BIN)llvm-ar
 LD ?= $(CLANG_BIN)llvm-ld
 else ifeq ($(origin CC),default)
-CC = gcc
-CXX = g++
-AS = gcc
-AR = ar
-LD = ld
+# MU_CHANGE STARTs: Support GCC prefix
+CC ?= $(GCC_PREFIX)gcc
+CXX ?= $(GCC_PREFIX)g++
+AS ?= $(GCC_PREFIX)gcc
+AR ?= $(GCC_PREFIX)ar
+LD ?= $(GCC_PREFIX)ld
+# MU_CHANGE ENDs
 endif
 LINKER ?= $(CC)
 ifeq ($(HOST_ARCH), IA32)