Fix misconfigured Homebrew Python 2.7 path in default vimrc

Fix macvim-dev#803

Author: ychin

src/MacVim/vimrc

@@ -19,7 +19,7 @@ set langmenu=none
 " version. However, following code tries to find a Homebrew, MacPorts or
 " an installation from python.org:
 if exists("&pythondll") && exists("&pythonhome")
-  if filereadable("/usr/local/Library/Frameworks/Python.framework/Versions/2.7/Python")
+  if filereadable("/usr/local/Frameworks/Python.framework/Versions/2.7/Python")
     " Homebrew python 2.7
     set pythondll=/usr/local/Frameworks/Python.framework/Versions/2.7/Python
     set pythonhome=/usr/local/Frameworks/Python.framework/Versions/2.7