Ignore NOTICES in license-header-check

Author: MrAlias

Makefile

@@ -384,7 +384,7 @@ oats-test-debug: oats-prereq
 
 .PHONY: license-header-check
 license-header-check:
-	@licRes=$$(for f in $$(find . -type f \( -iname '*.go' -o -iname '*.sh' -o -iname '*.c' -o -iname '*.h' \) ! -path './.git/*' ) ; do \
+	@licRes=$$(for f in $$(find . -type f \( -iname '*.go' -o -iname '*.sh' -o -iname '*.c' -o -iname '*.h' \) ! -path './.git/*' ! -path './NOTICES/*' ) ; do \
 	           awk '/Copyright The OpenTelemetry Authors|generated|GENERATED/ && NR<=4 { found=1; next } END { if (!found) print FILENAME }' $$f; \
 	   done); \
 	   if [ -n "$${licRes}" ]; then \