util/lint: Add rules.h & compiler.h to 019-header-files linter

The rules.h & compiler.h includes were removed in previous commits, so
add the checks to keep them out to the linter.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: If4964ff26f5e83abbbdd26c2b1cd9a2eab5a0a0d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67350
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>

util/lint/lint-stable-019-header-files

@@ -9,8 +9,7 @@ LC_ALL=C export LC_ALL
 INCLUDED_DIRS='^src/'
 EXCLUDED_FILES='src/include/kconfig.h'
 
-# TODO: Add rules when those patches are complete
-HEADER_FILES="k*config"
+HEADER_FILES="k\?config rules compiler"
 
 # Use git grep if the code is in a git repo, otherwise use grep.
 if [ -n "$(command -v git)" ] && \