endeavoru kernel compat modules: move building of modules to target

To avoid pollution of SRC dirs, we copy the compat wifi module
sources to the target area and build it there, keeping source
area clear.

Change-Id: Id077c974f30d58851dc6e31b8d77f9dabbade5b8
Merge "endeavoru kernel compat modules: move building of modules to target" into cm-10.1