(Rob V.)
(Rob V.)

- Fixed the Maya plugin build so that the plugin is built with the same compiler
  used to build Houdini.
 
  For example, on belarus, we want to build the plugin with g++44 and not g++.

- Use ?= instead for CXX assignment since it looks cleaner.

sonictk/HoudiniEngineForMaya,sonictk/HoudiniEngineForMaya,sonictk/HoudiniEngineForMaya