[Determinism] Add deterministic functions (#216)

This patch adds implementations of deterministic functions.

The SIMD source files(sleefsimd?p.c) are compiled twice for each vector extension, with DETERMINISTIC macro turned on and off.
Renaming by rename*.h is switched according to DETERMINISTIC macro.

When DETERMINISTIC macro is undefined, the function name xsin will be renamed to Sleef_sind2_u35sse2 with renamesse2.h, for example.

If DETERMINISTIC macro is defined, the function name xsin will be renamed to Sleef_cinz_sind2_u35sse2, for example.

iuty* and tester2y* are added in order to test the newly added deterministic functions. As a consequence, time for testing is increased to almost two times.