CI: ignore buildpaths QA check in clang builds

If clang builds assembler code the debug symbols contain unmapped build
paths which trigger the buildpaths QA check. This bug has been filed
with upstream:

https://github.com/llvm/llvm-project/issues/56609

Until it is fixed, exclude buildpaths from clang builds so that CI can
pass.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

ci/clang.yml

@@ -8,3 +8,6 @@ repos:
 local_conf_header:
   clang: |
     TOOLCHAIN = "clang"
+    # Clang causes more binaries to have buildpaths in the debug symbols
+    # https://github.com/llvm/llvm-project/issues/56609
+    WARN_QA:remove = "buildpaths"