Revert "Remove unneeded -Wno-constant-logical-operand flag"

This reverts commit 4f0ce757.

Reason for revert: Breaks several targets in internal git_master, e.g. http://ab/5165971.

Test: Build failing library
Change-Id: I02a5ade05a76b24020586c55a4e8f441ca7708a9

parent 4f0ce757

cc/config/clang.go

+3 −0

Original line number	Diff line number	Diff line
		@@ -186,6 +186,9 @@ func init() {
		// compatibility.
		"-Wno-c++98-compat-extra-semi",

		// Disable this warning until we can fix all instances where it fails.
		"-Wno-constant-logical-operand",

		// Disable this warning because we don't care about behavior with older compilers.
		"-Wno-return-std-move-in-c++11",