Fix testing when configure with --with-multilib-generator=

 - Current script will only handle first 2 items in
   `--with-multilib-generator=`.

Makefile.in

@@ -57,7 +57,7 @@ ifeq ($(MULTILIB_GEN),)
 NEWLIB_MULTILIB_NAMES := @newlib_multilib_names@
 GCC_MULTILIB_FLAGS := $(MULTILIB_FLAGS)
 else
-NEWLIB_MULTILIB_NAMES := $(shell echo "$(MULTILIB_GEN)" | $(SED) 's/;/\n/'| $(AWK) '{split($$0,a,"-"); printf "%s-%s ", a[1],a[2]}')
+NEWLIB_MULTILIB_NAMES := $(shell echo "$(MULTILIB_GEN)" | $(SED) 's/;/\n/g'| $(AWK) '{split($$0,a,"-"); printf "%s-%s ", a[1],a[2]}')
 GCC_MULTILIB_FLAGS := $(MULTILIB_FLAGS) --with-multilib-generator="$(MULTILIB_GEN)"
 endif
 GLIBC_MULTILIB_NAMES := @glibc_multilib_names@