[X86][SSE]: Adding full coverage of MC encoding tests for the SSE isa sets.<NFC>

[X86][SSE]: Adding full coverage of MC encoding tests for the SSE isa sets.<NFC>

Summary:
NFC.
Adding MC regressions tests to cover all the SSE ISA sets as follows:
SSE, SSE2, SSE3, SSE4, SSE42, SSEMXCSR, SSE_PREFETCH, SSSE3

This patch is part of a larger task to cover MC encoding of all X86 ISA Sets.
See revision: https://reviews.llvm.org/D39952

Patch by Gadi Haber and Wang Tianqing

Reviewers: RKSimon, zvi, craig.topper, AndreiGrischenko, gadi.haber, LuoYuanke

Reviewed By: craig.topper

Subscribers: jfb, llvm-commits

Differential Revision: https://reviews.llvm.org/D40387

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352955 91177308-0d34-0410-b5e6-96231b3b80d8