Remove "mongoose" prefix from includes

In certain files it was necessary to make tests work from public
mongoose repo, so this commit makes things consistent.

PUBLISHED_FROM=694454d0ff007229c65d524a2a2beaf126420f15

src/mg_uri.c

@@ -3,8 +3,8 @@
  * All rights reserved
  */
 
-#include "mongoose/src/mg_internal.h"
-#include "mongoose/src/mg_uri.h"
+#include "mg_internal.h"
+#include "mg_uri.h"
 
 /*
  * scan string until encountering one of `seps`, keeping track of component