Download git package via https.

R=cmp@chromium.org

Review URL: https://codereview.chromium.org/139733003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@249612 0039d316-1c4b-4281-b951-d872f2087c98

bootstrap/win/win_tools.bat

@@ -34,7 +34,7 @@ goto :GIT_180_CHECK
 set GIT_VERSION=1.8.5.2.chromium.1
 set GIT_BIN_DIR=git-%GIT_VERSION%_bin
 set GIT_ZIP_FILE=%GIT_BIN_DIR%.zip
-set GIT_ZIP_URL=http://commondatastorage.googleapis.com/chrome-infra/%GIT_ZIP_FILE%
+set GIT_ZIP_URL=https://commondatastorage.googleapis.com/chrome-infra/%GIT_ZIP_FILE%
 goto :GIT_COMMON