BUG : fix fetch of freetype version during build

Use freetype-config --ftversion flag to get freetype version (previously
using freetype-config --version which returns libtool version).

Author: matthew-brett

setupext.py

@@ -896,7 +896,7 @@ def check(self):
         if sys.platform == 'win32':
             return "Unknown version"
 
-        status, output = getstatusoutput("freetype-config --version")
+        status, output = getstatusoutput("freetype-config --ftversion")
         if status == 0:
             version = output
         else: