[PATCH] Remove log2 dependency when building against Android API-9 SDK

[Pierre-Andre Saulais]

That's true, this commit would require manually setting HAVE_LOG2 to zero on Android. Since HAVE_LOG2 and other macros have been dropped (r231679) I was trying not to pull the autoconf/CMake changes back. I see two solutions:

1. Use 'log(n) / log(2)' instead of log2l on Android, don't use HAVE_LOG2 at all.
2. Reintroduce HAVE_LOG2 through CMake and autoconf. Remove the Android-specific changes added by Vince.

I am uploading a new patch that does 1) since that's the least intrusive change.


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http://reviews.llvm.org/D9884

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