This CL enables static analysis support for Clang builds on Windows.
Developers can opt-in to receiving analysis text by setting
"use_clang_static_analyzer = true" in their GN build
args. The solution works with Goma.
* Added flags to Clang portions of build/toolchain/win/BUILD.gn.
* Added options to the Analysis wrapper script to handle clang-cl.exe's
flag style.
BUG=687243
Review-Url: https://codereview.chromium.org/2748793004
Cr-Original-Commit-Position: refs/heads/master@{#457566}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 5847e4bdf3b65ccc136bc42ef00d573f2adb50fb