fixes for Xcode 5

tools/gyp/find_mac_gcc_version.py

Index: tools/gyp/find_mac_gcc_version.py
diff --git a/tools/gyp/find_mac_gcc_version.py b/tools/gyp/find_mac_gcc_version.py
index 1f136ddce8eb62dcb13c192309c4a94f7c4958a0..059838086ec2fa53fd3b293c53b6931623749d7d 100755
--- a/tools/gyp/find_mac_gcc_version.py
+++ b/tools/gyp/find_mac_gcc_version.py
@@ -25,11 +25,11 @@ def main():
       return '4.2'
     elif major == 4 and minor < 5:
       return 'com.apple.compilers.llvmgcc42'
-    elif major == 4 and minor >= 5:
+    elif (major == 4 and minor >= 5) or major == 5:
       # XCode seems to select the specific clang version automatically
       return 'com.apple.compilers.llvm.clang.1_0'
     else:
-      raise Exception('Unknown XCode Version "%s"' % version_match)
+      raise Exception('Unknown XCode Version "%s"' % stdout)
   else:
     raise Exception('Could not parse output of xcodebuild "%s"' % stdout)