Add a coverage_patterns kwarg to ARM_MICRO

Author: rwalton-arm

tools/toolchains/arm.py

@@ -504,7 +504,8 @@ def __init__(
             silent=False,
             extra_verbose=False,
             build_profile=None,
-            build_dir=None
+            build_dir=None,
+            coverage_patterns=None,
     ):
         target.default_toolchain = "uARM"
         if int(target.build_tools_metadata["version"]) > 0: