[lldb] Fix finding make tool for tests (llvm#111980)

Fixes 0e91323 /
llvm#111531

For reasons I can't explain, a clean build works fine for me, and all
the bots are working fine. But if I rebuild in some way the make tool
becomes None.

Looking at the other variables, they had these extra lines so I've added
those for make and it seems to solve the problem.

lldb/utils/lldb-dotest/CMakeLists.txt

@@ -34,6 +34,7 @@ set(vars
   LLDB_TEST_EXECUTABLE
   LLDB_TEST_COMPILER
   LLDB_TEST_DSYMUTIL
+  LLDB_TEST_MAKE
   LLDB_LIBS_DIR
   LLVM_TOOLS_DIR
   LIBCXX_LIBRARY_DIR

lldb/utils/lldb-dotest/lldb-dotest.in

@@ -9,6 +9,7 @@ arch = '@LLDB_TEST_ARCH@'
 executable = '@LLDB_TEST_EXECUTABLE_CONFIGURED@'
 compiler = '@LLDB_TEST_COMPILER_CONFIGURED@'
 dsymutil = '@LLDB_TEST_DSYMUTIL_CONFIGURED@'
+make = '@LLDB_TEST_MAKE_CONFIGURED@'
 lldb_build_dir = '@LLDB_TEST_BUILD_DIRECTORY_CONFIGURED@'
 lldb_build_intel_pt = "@LLDB_BUILD_INTEL_PT@"
 lldb_framework_dir = "@LLDB_FRAMEWORK_DIR_CONFIGURED@"
@@ -35,6 +36,7 @@ if __name__ == '__main__':
     cmd.extend(['--executable', executable])
     cmd.extend(['--compiler', compiler])
     cmd.extend(['--dsymutil', dsymutil])
+    cmd.extend(['--make', make])
     cmd.extend(['--lldb-libs-dir', lldb_libs_dir])
     cmd.extend(['--llvm-tools-dir', llvm_tools_dir])
     if has_libcxx: