ccid: Build with -Wall

Change-Id: I50cf270aefa4c9fd0d7ab27a9a6e4716a2e95416
diff --git a/ccid/Makefile b/ccid/Makefile
index a259c90..018b223 100644
--- a/ccid/Makefile
+++ b/ccid/Makefile
@@ -1,10 +1,10 @@
-
+CFLAGS=-Wall -g
 
 ccid_descriptors: ccid_descriptors.o ccid_proto.o
-	$(CC) -lasan -losmocore -laio -o $@ $^
+	$(CC) $(CFLAGS) -lasan -losmocore -laio -o $@ $^
 
 %.o: %.c
-	$(CC) -o $@ -c $^
+	$(CC) $(CFLAGS) -o $@ -c $^
 
 clean:
 	rm ccid_descriptors *.o