Document deployment flags on UI and signer's Makefiles (#123)

- Documented appFlags parameter on UI and signer
- Removed unused constant APP_LOAD_PARAMS

ledger/src/signer/Makefile

@@ -45,7 +45,8 @@ include $(BOLOS_SDK)/Makefile.defines
 # Main app configuration
 APPNAME = "RSK Sign"
 APPVERSION = 3
-APP_LOAD_PARAMS = --appFlags 0x00 $(COMMON_LOAD_PARAMS)
+# No flags
+APPFLAGS = 0x00
 PROG = "app"
 
 # Build configuration
@@ -111,7 +112,7 @@ load: bin/app.hex
 		--delete \
 		--targetId $(TARGET_ID)  \
 		--fileName bin/$(PROG).hex \
-		--appFlags 0x0 \
+		--appFlags $(APPFLAGS) \
 		--appName $(APPNAME) \
 		--appVersion $(APPVERSION) \
 		--icon `cat icon.hex` \

ledger/src/ui/Makefile

@@ -44,6 +44,8 @@ endif
 APPNAME = UX
 APPVERSION = 3
 VERSION = ux$(APPVERSION)
+# APPLICATION_FLAG_BOLOS_UX | APPLICATION_FLAG_GLOBAL_PIN | APPLICATION_FLAG_BOLOS_SETTINGS
+APPFLAGS = 0x248
 # By default, don't build debug code.
 DEBUG_BUILD = 0
 ################
@@ -219,7 +221,7 @@ load: bin/built
 		--delete \
 		--targetId $(TARGET_ID) \
 		--fileName bin/$(PROG).hex \
-		--appFlags 0x248 \
+		--appFlags $(APPFLAGS) \
 		--appName $(APPNAME) \
 		--appVersion $(APPVERSION) \
 		--icon `cat icon.hex` \