On Windows, force the output directories to be src/build/{Debug,Release}.

This allows develoeprs to build from any sln file and not have to rebuild the
world.  This is more like how XCode projects are generated.

We choose src/build/{Debug,Release} because this is where all.sln generates
files and this is what the bots use.  This shouldn't require any changes to
the bots.

BUG=95278

Review URL: http://codereview.chromium.org/7835006

git-svn-id: http://src.chromium.org/svn/trunk/src/build@102514 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -1175,7 +1175,7 @@
       'Common_Base': {
         'abstract': 1,
         'msvs_configuration_attributes': {
-          'OutputDirectory': '$(SolutionDir)$(ConfigurationName)',
+          'OutputDirectory': '<(DEPTH)\\build\\$(ConfigurationName)',
           'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
           'CharacterSet': '1',
         },