gdmwimax: add $LDFLAGS to link command line.

BUG=chromium:293851
TEST=`USE=gdmwimax emerge-$BOARD gdmwimax` and verify that $LDFLAGS
is used when compiling "cm".

Change-Id: I3d097a6ca9aa65124b033eab1de18570c01de342
Reviewed-on: https://chromium-review.googlesource.com/169805
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
diff --git a/cm/Makefile b/cm/Makefile
index 0e4f7e2..f6cb457 100644
--- a/cm/Makefile
+++ b/cm/Makefile
@@ -32,7 +32,7 @@
 all: $(CM)
 
 $(CM): $(obj-cm) $(SDK_LIB)
-	$(CC) -o $@ $(obj-cm) $(LIBS)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(obj-cm) $(LIBS)
 
 clean:
 	-rm -f $(CM) *.a *.so *.elf *.gdb *.o