Remove /Zc:sizedDealloc- from the MSVC build
Remove /Zc:sizedDealloc- from the MSVC build

According to the connect bug
(https://connect.microsoft.com/VisualStudio/feedback/details/1351894),
this was only necessary with pre-release versions of MSVC 2015.

Fixes PR23513

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@289257 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,apple/swift-llvm