[vim] Check out/Default/ for most recent ninja files.

When using GN for building Chromium, YouCompleteMe, :CrBuild, and
:CrCompileFile should use out/Default/build.ninja for compilation. This
patch adds 'Default' to the existing list of 'Debug' and 'Release'
subdirectories to check for the most recently changed build.ninja file.

BUG=NONE

Review URL: https://codereview.chromium.org/1405023003

Cr-Original-Commit-Position: refs/heads/master@{#354376}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 893644f10cd111b54be9c98bb2d7d7a1fd9240c1
1 file changed