ARMClang: Pass defines to assembler

This is useful when the assembly file(s) is passed to
the pre-processor.

Modules/Compiler/ARMClang-ASM.cmake

@@ -3,7 +3,7 @@ include(Compiler/ARMClang)
 set(CMAKE_ASM_OUTPUT_EXTENSION ".o")
 set(CMAKE_ASM_OUTPUT_EXTENSION_REPLACE 1)
 
-set(CMAKE_ASM_COMPILE_OBJECT       "<CMAKE_ASM_COMPILER> <INCLUDES> <FLAGS> -c -o <OBJECT> <SOURCE>")
+set(CMAKE_ASM_COMPILE_OBJECT       "<CMAKE_ASM_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -c -o <OBJECT> <SOURCE>")
 set(CMAKE_ASM_SOURCE_FILE_EXTENSIONS S;s;asm;msa)
 
 __compiler_armclang(ASM)