Add bugprone to global clang-tidy default checks

Test: WITH_TIDY=1 make
Change-Id: I1533c30035296fb1eaa7e2ff42360c5ff60a1d07
diff --git a/cc/config/tidy.go b/cc/config/tidy.go
index dd52a0e..4ac9e58 100644
--- a/cc/config/tidy.go
+++ b/cc/config/tidy.go
@@ -30,10 +30,12 @@
 		}
 		return strings.Join([]string{
 			"-*",
+			"bugprone*",
 			"clang-diagnostic-unused-command-line-argument",
 			"google*",
 			"misc-macro-parentheses",
 			"performance*",
+			"-bugprone-narrowing-conversions",
 			"-google-readability*",
 			"-google-runtime-references",
 		}, ",")