Add a script for dumping the list of defined symbols in system libraries

Signed-off-by: Martin Storsjö <martin@martin.st>

dump-libs.sh

+#!/bin/sh
+
+for i in stagefright media utils binder; do
+	nm -D --defined-only lib$i.so | awk '{print $3}' | grep -v ^__aeabi | grep '\(IInterface\|OMXObserver\|MemoryDealer\|Binder\|RefBase\|String\|OMXClient\|IMemory\|^str\)' > lib$i.symbols
+done
+