clean up rebar build problems with examples/src

Clean up some duplicate options and extra whitespace in
examples/src/Makefile, and add examples/src to rebar.config to make
sure it gets built under rebar.

examples/src/Makefile

@@ -14,13 +14,15 @@ MODULES= advanced_echo_callback \
          basic_echo_callback
 
 EBIN_FILES=$(MODULES:%=../ebin/%.$(EMULATOR))
-ERLC_FLAGS+=-Werror $(DEBUG_FLAGS) -pa ../../yaws -I ../include
+ERLC_FLAGS+=-Werror $(DEBUG_FLAGS)
 
 all: $(EBIN_FILES)
+
 debug:
-	$(MAKE) TYPE=debug	
+	$(MAKE) TYPE=debug
 
 clean:
 	rm -f $(EBIN_FILES)
-install:	all
+
+install: all
 	cp -f ../ebin/*.beam $(DESTDIR)$(VARDIR)/yaws/ebin

rebar.config

@@ -6,6 +6,7 @@
 {erl_opts, [{platform_define,
              "(linux|freebsd|darwin)", 'HAVE_SENDFILE'},
             no_debug_info,
+            {src_dirs, ["examples/src"]},
             warnings_as_errors]}.
 
 {port_envs, [{"CFLAGS", "$CFLAGS -g -O3 -Wall -I/usr/include/security"},