Ignore more files and directories

The vs_files directory is used for VS 2015 builds and needs to be in
.gitignore, along with vs2013_files.

The naming convention for timestamps is changed and .gitignore needs to
be updated for that.

Finally, the .pylint.d directory keeps being created and should be
ignored.

Review URL: https://codereview.chromium.org/1667853004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298682 0039d316-1c4b-4281-b951-d872f2087c98

.gitignore

@@ -5,6 +5,7 @@
 /git.bat
 /gitk.bat
 /pylint.bat
+/.pylint.d/
 /python
 /python.bat
 /ssh.bat
@@ -26,7 +27,8 @@
 /svn_bin
 /external_bin
 /win_toolchain/vs2013_files
-/win_toolchain/.timestamps
+/win_toolchain/vs_files
+/win_toolchain/*.timestamps
 /win_toolchain/.vspro
 /win_toolchain/data.json