- Add Nvidia workaround as option

Some users of Nvidia cards reports very high cpu usage by ecore_x_vsync,
in this case devel/efl should be rebuild with NVIDIA option enabled.

Submitted by:	6yearold <at> gmail <dot> com (via email)
Document freetype 2 vulnability.
Update freetype2 to 2.5.4.

MFH:		2014Q4
Security:	567beb1e-7e0a-11e4-b9cc-bcaec565249c