Merge pull request dotnet/coreclr#8382 from BruceForstall/FixShift
authorBruce Forstall <brucefo@microsoft.com>
Thu, 1 Dec 2016 00:47:24 +0000 (16:47 -0800)
committerGitHub <noreply@github.com>
Thu, 1 Dec 2016 00:47:24 +0000 (16:47 -0800)
Fix x86 encoder to use 64-bit type to accumulate opcode/prefix bits

Commit migrated from https://github.com/dotnet/coreclr/commit/392748e2df331ca3cfb9f7b08655f2a4379fc527


Trivial merge