ARMCC: Fix flag used for response files

ARMCC does not use the `@` sigil to indicate response files, but instead
the `--via=` flag. See the documentation here:

    http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491h/CHDCIEGC.html

Fixes: #16425

Modules/Compiler/ARMCC.cmake

@@ -28,6 +28,7 @@ macro(__compiler_armcc lang)
 
   set(CMAKE_${lang}_OUTPUT_EXTENSION ".o")
   set(CMAKE_${lang}_OUTPUT_EXTENSION_REPLACE 1)
+  set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "--via=")
 
   set(CMAKE_${lang}_LINK_EXECUTABLE      "<CMAKE_LINKER> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <LINK_LIBRARIES> <OBJECTS> -o <TARGET> --list <TARGET_BASE>.map")
   set(CMAKE_${lang}_CREATE_STATIC_LIBRARY  "<CMAKE_AR> --create -cr <TARGET> <LINK_FLAGS> <OBJECTS>")