Lower PSAPI_VERSION to 1 to try to get Chrome launching again on < Windows 7 after r96592.

BUG=none
TEST=Launches on XP/Vista
TBR=georgey
Review URL: http://codereview.chromium.org/7633044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96657 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index 2c753182..87c0a22 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1754,6 +1754,7 @@
           'WIN32',
           '_WINDOWS',
           'NOMINMAX',
+          'PSAPI_VERSION=1',
           '_CRT_RAND_S',
           'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
           'WIN32_LEAN_AND_MEAN',