Added 2 notes 1) Skylake and KNL support for X86 2) masked intrinsics load/store/gather/scatter
Added 2 notes
1) Skylake and KNL support for X86
2) masked intrinsics load/store/gather/scatter

Differential Revision: http://reviews.llvm.org/D18353



git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@264703 91177308-0d34-0410-b5e6-96231b3b80d8

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