AI 149005: Change from ndk to platform's ndk (pndk), the ability to make your own java callable libraries to c code.

BUG=1857858

Automated import of CL 149005

pdk/pndk/samples/sample/use_hellolibrary.c

@@ -0,0 +1,9 @@
+/* use_hellolibrary.c -- used to show how to link to the hellolibrary */
+
+int hellolibrary(char *msg);
+
+int main()
+{
+  hellolibrary("Hello from the NDK.\n");
+  return 0;
+}