tc: respect LDFLAGS for %.so targets

Since there aren't any targets that currently use this pattern rule, this
is more of a proactive fix.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

tc/Makefile

@@ -87,7 +87,7 @@ YACC := bison
 LEX := flex
 
 %.so: %.c
-	$(CC) $(CFLAGS) -shared -fpic $< -o $@
+	$(CC) $(CFLAGS) $(LDFLAGS) -shared -fpic $< -o $@
 
 
 all: libtc.a tc $(TCSO)