cmake: skip build time priority checking with armclang

The script does not play well with armclang binariest at the moment.
Disable the automatic invocation when running with armclang, at least
until this is investigated and fixed.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

CMakeLists.txt

@@ -1804,7 +1804,8 @@ if(CONFIG_BUILD_OUTPUT_INFO_HEADER)
     )
 endif()
 
-if(CONFIG_CHECK_INIT_PRIORITIES)
+if(CONFIG_CHECK_INIT_PRIORITIES AND
+   NOT CMAKE_C_COMPILER_ID STREQUAL "ARMClang")
   if(CONFIG_CHECK_INIT_PRIORITIES_FAIL_ON_WARNING)
     set(fail_on_warning "--fail-on-warning")
   endif()

Kconfig.zephyr

@@ -757,6 +757,9 @@ config CHECK_INIT_PRIORITIES
 	  priority), see CHECK_INIT_PRIORITIES_FAIL_ON_WARNING to fail on
 	  warnings (dependent devices, same priority) as well.
 
+	  NOTE: this check is does not support armclang binaries and is
+	  currently silently skipped for those.
+
 config CHECK_INIT_PRIORITIES_FAIL_ON_WARNING
 	bool "Fail the build on priority check warnings"
 	depends on CHECK_INIT_PRIORITIES