Adding C-based sin/cos functions to sphereflake

Standard libraries have slightly different results on different targets.
To make the output reproducible in any target we need some C-based
implementation that is simple enough to be the same on all archs.

We could create a common test-suite library for all those functions
(sin/cos, sqrt, rand, etc) and change all tests that were cooked to
accept bogus results to use them, but that's for another commit.


git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@204133 91177308-0d34-0410-b5e6-96231b3b80d8
Removing stderr output from sphereflake

Avoiding issues with different output in different systems.


git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@204136 91177308-0d34-0410-b5e6-96231b3b80d8