Some code generated by antlr causes clang to emit warning warning: equality comparison with extraneous parentheses [-Wparentheses-equality] The warning is suppressed specifically for clang without affecting other compilers. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Zenith432 <zenith432@users.sourceforge.net> Reviewed-by: Liming Gao <liming.gao@intel.com>