Revert "Enable -Wsingle-bit-bitfield-constant-conversion"

Revert submission 3238689-bitfield-warning-cleanup

Reason for revert: Droidmonitor created revert due to b/362819160.

Reverted changes: /q/submissionid:3238689-bitfield-warning-cleanup

Change-Id: I9a35a52a79145541bb6bb3880ae8de2d1c09c02e
diff --git a/cc/config/global.go b/cc/config/global.go
index c838357..0e8fff6 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -287,7 +287,8 @@
 		"-Wno-error=deprecated-builtins", // http://b/241601211
 		"-Wno-error=deprecated",          // in external/googletest/googletest
 		// New warnings to be fixed after clang-r475365
-		"-Wno-error=enum-constexpr-conversion", // http://b/243964282
+		"-Wno-error=single-bit-bitfield-constant-conversion", // http://b/243965903
+		"-Wno-error=enum-constexpr-conversion",               // http://b/243964282
 		// New warnings to be fixed after clang-r522817
 		"-Wno-error=invalid-offsetof",
 		"-Wno-error=thread-safety-reference-return",