pw_preprocessor: Macros for disabling warnings

Change-Id: I00e9b00d93b46fa7a30e2cb7e6b83e5a81310585
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/40460
Commit-Queue: Wyatt Hepler <hepler@google.com>
Reviewed-by: Ewout van Bekkum <ewout@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
diff --git a/pw_preprocessor/BUILD b/pw_preprocessor/BUILD
index d0d14d7..46494d1 100644
--- a/pw_preprocessor/BUILD
+++ b/pw_preprocessor/BUILD
@@ -32,6 +32,7 @@
 TESTS = [
     "arguments_test",
     "boolean_test",
+    "compiler_test",
     "concat_test",
     "util_test",
 ]