examples: fix default rule for the debugging example

adriweb · adriweb · commit 3b9fc3eb9918 · 2018-02-10T23:17:21.000+08:00
Now when we do `make` in the examples/ directory, this one will be
built as intended
diff --git a/examples/debugging/makefile b/examples/debugging/makefile
@@ -12,4 +12,7 @@ DESCRIPTION ?= "C SDK Demo"
 
 # ----------------------------
 
+# This is just so the main makefile in $CEDEV/examples makes this one be like "make debug"
+.DEFAULT_GOAL := debug
+
 include $(CEDEV)/include/.makefile
