Use exported headers instead of copying

Use LOCAL_C_EXPORT_INCLUDE_DIRS to share exported headers instead of
copying them to $OUT/obj/include.  Fixes make warnings on multiple rules
to copy the headers from the shared and static versions of the library.

Change-Id: Ide68ed604a62c9eb693dc4bca892f1781622ff95
diff --git a/packagelistparser/packagelistparser.c b/packagelistparser/packagelistparser.c
index 3e2539c..16052e2 100644
--- a/packagelistparser/packagelistparser.c
+++ b/packagelistparser/packagelistparser.c
@@ -29,7 +29,7 @@
 #define LOG_TAG "packagelistparser"
 #include <utils/Log.h>
 
-#include "packagelistparser.h"
+#include <packagelistparser/packagelistparser.h>
 
 #define CLOGE(fmt, ...) \
     do {\