Roll windows git to include htmlpathalt.

This will allow e.g. `git help rebase-update` to work.

R=agable@chromium.org
BUG=238428

Review URL: https://codereview.chromium.org/253243002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@267038 0039d316-1c4b-4281-b951-d872f2087c98

bootstrap/win/win_tools.bat

@@ -64,8 +64,8 @@ goto :GIT_190_CHECK
 
 
 :GIT_190_CHECK
-set GIT_ERASE_TOP=2
-set GIT_VERSION=1.9.0.chromium.3
+set GIT_ERASE_TOP=3
+set GIT_VERSION=1.9.0.chromium.4
 
 if not "%DEPOT_TOOLS_GIT_BLEEDING%" == "1" goto :GIT_190_CHECK_REST
 set GIT_ERASE_TOP=3