ndk: Fix GB x86 definitions for libm.so

The previous header and implementation were incorrect and didn't produce
correct results. This has been fixed in the internal Gingerbread branch.

Technically, this could result in ABI breakage, but the chances are very
low, and there are no official x86 Gingerbread release yet.

Change-Id: I0b2d857399358775d1490b72a1b75baac362f839
2 files changed