facebook/hhvm — pull request #1403 by javer (2013-12-20 17:39:12+00:00)
Title: Fix cmake freetype include directory

Fixed overwriting FREETYPE_INCLUDE_DIRS when freetype located at non-default path.

Without this fix CMakeCache.txt contains the following line even when freetype really located in /usr/include/freetype2 (as in Ubuntu 12.04 and others):
```
FREETYPE_INCLUDE_DIRS:PATH=/usr/include
```