8851 libast: parameter/variable set but not used

Reviewed by: Andrew Stormont <andyjstormont@gmail.com>
Reviewed by: Yuri Pankov <yuripv@gmx.com>
Approved by: Dan McDonald <danmcd@joyent.com>

usr/src/lib/libast/Makefile.com

@@ -728,6 +728,8 @@ CERRWARN += -_gcc=-Wno-uninitialized
 CERRWARN += -_gcc=-Wno-char-subscripts
 CERRWARN += -_gcc=-Wno-clobbered
 CERRWARN += -_gcc=-Wno-unused-variable
+CERRWARN += -_gcc=-Wno-unused-but-set-variable
+CERRWARN += -_gcc=-Wno-unused-but-set-parameter
 CERRWARN += -_gcc=-Wno-unused-value
 CERRWARN += -_gcc=-Wno-unused-function
 CERRWARN += -_gcc=-Wno-unused-label