armclang: specify armlink link executable signature

The default armlink signature uses `--list=<TARGET_BASE>.map`, but in
Zephyr we uses a different name for the map file, therefore we need to
specify a custom link executable signature.

This is done in the linker specific flags file:
cmake/linker/armlink/linker_flags.cmake

Signed-off-by: Torsten Rasmussen <[email protected]>

Author: tejlmand

cmake/linker/armlink/linker_flags.cmake

@@ -0,0 +1,6 @@
+# The ARMClang linker, armlink, requires a dedicated linking signature in
+# order for Zephyr to control the map file.
+
+set(CMAKE_C_LINK_EXECUTABLE "<CMAKE_LINKER> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <LINK_LIBRARIES> <OBJECTS> -o <TARGET>")
+set(CMAKE_CXX_LINK_EXECUTABLE "<CMAKE_LINKER> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <LINK_LIBRARIES> <OBJECTS> -o <TARGET>")
+set(CMAKE_ASM_LINK_EXECUTABLE "<CMAKE_LINKER> <CMAKE_ASM_LINK_FLAGS> <LINK_FLAGS> <LINK_LIBRARIES> <OBJECTS> -o <TARGET>")