fix-tests
[libc][math] Differential "diff" test for hypot/hypotf functions.
[libc][math] fmod/fmodf implementation.
[libc] Show average runtime for math single-input-single-output performance tests.
[libc] Add diff and perf targets for more math functions
[libc] Add differential quality and perf analysis targets for sinf and cosf.
[libc] Add implementation of expm1f.
[libc] Add performance tests for hypotf and hypot.
[libc] Implement log10f correctly rounded for all rounding modes.
[libc] Implement log1pf correctly rounded to all rounding modes.
[libc] Implement correctly rounded log2f based on RLIBM library.
[libc] Implement correctly rounded logf based on RLIBM library.