Revert 289650 "Roll buildtools, this updates VS2013 Pro to Update 3"

gfx_unittests fails on x64_rel.

Unclear why tryjob was successful, perhaps different hardware between tryjob and waterfall.

> Roll buildtools, this updates VS2013 Pro to Update 3
> 
> TBR=iannucci@chromium.org
> NOTRY=true
> BUG=402543
> 
> Review URL: https://codereview.chromium.org/458353003

TBR=scottmg@chromium.org

Review URL: https://codereview.chromium.org/477013002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@289729 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

get_landmines.py

@@ -47,7 +47,6 @@ def print_landmines():
       gyp_msvs_version().startswith('2013')):
     print "Switched win from VS2010 to VS2013."
     print "Update to VS2013 Update 2."
-    print "Update to VS2013 Update 3."
   print 'Need to clobber everything due to an IDL change in r154579 (blink)'
   print 'Need to clobber everything due to gen file moves in r175513 (Blink)'
   if (platform() != 'ios'):