Create math_utils.h to centralize general math utilities

Google-Bug-Id:559754428
PiperOrigin-RevId: 991160240
Change-Id: I3e75d2177fa3e62f1255d9b672d26438830c6252

gbmcweb

diff --git a/gbmcweb b/gbmcweb
index 7ade742..9549298 160000
--- a/gbmcweb
+++ b/gbmcweb
@@ -1 +1 @@
-Subproject commit 7ade7425e446fcecf917abca8f8b8509fba82dd5
+Subproject commit 954929837e6454bb6f1b3d06978bf38f47dd49b0