Work around C11 const atomic restrictions.

Cast away the const qualifier in BBinder::findObject.  C11, unlike C++11,
does not allow loads from const atomics.  This is widely regarded as
a bug (see WG14 DR 459).  This is a hack to work around it until it's
officially fixed in the spec.

load_const_atomic was adapted from commit
1e8587a479fd8b1ce9b594298a93f517816e8f15

I don't think we want to dignify this by putting it into a header file.

Bug:17067219
Change-Id: Icbfcbda2722e6f80d2bb065a0bb3ec7634bcacb2
Merge "Work around C11 const atomic restrictions."
Fix warnings on unused variables and parameters.

BUG: 17474723
Change-Id: If40f5e765090cfb970e4129b78b1e74cf8bad217
Merge "Fix warnings on unused variables and parameters."
Clean cruft out of makefiles.

Cleans up manual uses of stlport and bionic (and removes uses of private
bionic headers).

Change-Id: I157309d702e59152adfa3450939082248ae4c043
Merge "Clean cruft out of makefiles."