Fix buildutil regex

Review URL: http://chromereview.prom.corp.google.com/1187037

git-svn-id: svn://chrome-svn/chromeos/trunk@230 06c00378-0e64-4dae-be16-12b19f9950a1
diff --git a/buildutil.py b/buildutil.py
index 1aeb27f..1d83b36 100644
--- a/buildutil.py
+++ b/buildutil.py
@@ -29,7 +29,7 @@
 class BuildUtil(BuildObject):
 
   def GetPackageName(self, pkg_path):
-    cmd = "cat %s/debian/control | grep Package | cut -d \" \" -f 2-" % pkg_path
+    cmd = "cat %s/debian/control | grep Package: | cut -d \" \" -f 2-" % pkg_path
     return os.popen(cmd).read().strip() 
 
   def GetLastBuildTime(self, pkg_name):
@@ -116,4 +116,3 @@
         "output_file_name": build_file
       }
     return pkgs
-