tree 6c05f601f530a6435bd1fd319cf8761f6c80e9d6
parent b18c3880f7a113c35ab659234445033902c9e02e
author Marius Brehler <marius.brehler@iml.fraunhofer.de> 1579106663 -0800
committer Copybara-Service <copybara-worker@google.com> 1579106719 -0800

Set default CMAKE_BUILD_TYPE to Release and implement CMAKE_BUILD_TYPE FastBuild

* Sets the default `CMAKE_BUILD_TYPE` to `Release`
* Implements a custom build type `FastBuild`
  * If the `CMAKE_BUILD_TYPE` is set to `FastBuild`, for LLVM the `CMAKE_BUILD_TYPE` is set to `Relase`

Closes https://github.com/google/iree/pull/474

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/iree/pull/474 from marbre:cmake_build_type be143f166341acc4306d36a8e249ca64d2ac1298
PiperOrigin-RevId: 289866898