Fix actual errors and remove warnings suppressions.

Bug: 21764905

This got missed during 64-bit bringup last year. These functions are
safe to sidestep, since RenderScript does not use C++ modules. We still
have to declare/define them because of Clang's interface here. The other
-Wno* warning suppressions were unused, so I am removing those as well.

Change-Id: I9dba84f124fad3eade5f0a3f3025a9fb2bba1f7c
2 files changed