drm_hwcomposer: CI: Process every file with clang-tidy.

Currently part of header files isn't processed by CI.

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/utils/properties.h b/utils/properties.h
index c8ddbae..0b49c61 100644
--- a/utils/properties.h
+++ b/utils/properties.h
@@ -17,6 +17,7 @@
 // NOLINTNEXTLINE(readability-identifier-naming)
 auto inline property_get(const char *name, char *value,
                          const char *default_value) -> int {
+  // NOLINTNEXTLINE (concurrency-mt-unsafe)
   char *prop = std::getenv(name);
   snprintf(value, PROPERTY_VALUE_MAX, "%s",
            (prop == nullptr) ? default_value : prop);