smogcheck: fix a typo "-W1" in Makefile

This fixes a typo of "-W1" to "-Wl" to make it compile.

BUG=None
TEST=emerge-lumpy smogcheck passes.

Change-Id: Iee19aef3a47ad6fe7eb86bf166f8ef0c62c79d80
Reviewed-on: https://gerrit.chromium.org/gerrit/51192
Reviewed-by: Tan Gao <tgao@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
diff --git a/Makefile b/Makefile
index abb5f26..f17997a 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@
 	$(CC) $(CFLAGS) -o lib/lib_smogcheck.o -c lib/lib_smogcheck.c
 
 shared_libs: libs
-	$(CC) -shared -fPIC -o ${SONAME} lib/lib_smogcheck.o -W1,-h${SONAME} \
+	$(CC) -shared -fPIC -o ${SONAME} lib/lib_smogcheck.o -Wl,-h${SONAME} \
 	 -lpthread -lrt
 
 binary: shared_libs