binder: Add MemoryHeapBaseIon

Source:
http://git.insignal.co.kr/samsung/exynos/android/platform/frameworks/native/commit/?h=exynos-jb&id=dc4cd25cc41e4358debd0c7d1a2706d208a58df6

Change-Id: Ib06cc37a2a25c78a061ee2bad48eec2d01b07833
frameworks/base: Make sure Singleton instantiations are exported

This fixes using Singletons across shared library borders
with gcc 4.7+

Change-Id: I84b9cc99add4ace64c16e4fa8414a4fc7e4693c7
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>