split select out to its own file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92687 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/InstCombine/CMakeLists.txt

@@ -4,6 +4,7 @@ add_llvm_library(LLVMInstCombine
   InstCombineCompares.cpp
   InstCombineLoadStoreAlloca.cpp
   InstCombinePHI.cpp
+  InstCombineSelect.cpp
   InstCombineSimplifyDemanded.cpp
   InstCombineVectorOps.cpp
   )