[Doc] Document "Splat" in the lexicon

Patch by Wei-Ren Chen (陳韋任)!

Differential Revision: https://reviews.llvm.org/D32964


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302950 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed