flag-o-matic.eclass: all-flag-vars allow all -fsanitize* flags #553716

This fixes handling of -fsanitize=foo flags, as well as supporting flags
like -fsanitize-foo-bar.  Since gcc seems to be using that namespace for
all these settings, allow them all.

eclass/flag-o-matic.eclass

@@ -25,7 +25,7 @@ all-flag-vars() {
 setup-allowed-flags() {
 	ALLOWED_FLAGS="-pipe"
 	ALLOWED_FLAGS+=" -O -O1 -O2 -Os -Og -mcpu -march -mtune"
-	ALLOWED_FLAGS+=" -fstack-protector* -fsanitize=*"
+	ALLOWED_FLAGS+=" -fstack-protector* -fsanitize*"
 	ALLOWED_FLAGS+=" -fbounds-check -fbounds-checking -fno-strict-overflow"
 	ALLOWED_FLAGS+=" -fno-PIE -fno-pie -nopie -fno-unit-at-a-time"
 	ALLOWED_FLAGS+=" -g -g[0-9] -ggdb -ggdb[0-9] -gdwarf-* gstabs -gstabs+"