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>