Visual Studio linker out of memory

[kwaegel]

The visual studio 2012 linker reaches the 4GB memory limit and crashes when building pcl_features in Release mode. The resulting obscure error is:

LINK : fatal error C1510: Cannot load language resource clui.dll.

Turning off Whole Program Optimization (/GL) serves as a workaround for this problem. I'd suggest disabling this flag in CMake for pcl_features until we can fix the memory usage.

[jspricke]

Sounds good, can you make a patch and send it as a pull request? Thanks!