Update API level 9 sysroot to allow static C++ destructors to be called on dlclose().

This introduces crtbegin_so.o and crtend_so.o and also requires a corresponding
change in the NDK build scripts to use them.

Also add a small test under 'tests/dlclose-destruction' to check that.
Note that this is not a sample (i.e. Android application) per se.

Change-Id: Icf25836363a3ed59310e579ce990aeca868e70e4
13 files changed