cmake: Add to CMAKE_MODULE_PATH before project() to allow Platform cmake modules
cmake: Add to CMAKE_MODULE_PATH before project() to allow Platform cmake modules

The project() command normally includes the platform-specific module
Platform/${CMAKE_SYSTEM_NAME}.cmake.  To support loading that module
from the project's cmake module directory rather than just the system
cmake module directory, extend CMAKE_MODULE_PATH before calling
project().

Signed-off-by: Josh Triplett <c028c213ed5efcf30c3f4fc7361dbde0c893c5b7@joshtriplett.org>
Signed-off-by: Chad Versace <a557f7f75bf28dc19ac99107f5cc7cd6b3fbdb1a@linux.intel.com>

janesma/waffle,dcbaker/waffle,dcbaker/waffle,yinquan529/waffle-gl-waffle,fjhenigman/waffle,waffle-gl/waffle,waffle-gl/waffle,evelikov/waffle,janesma/waffle,fjhenigman/waffle,maurossi/waffle,chadversary/waffle,waffle-gl/waffle,chadversary/waffle,dcbaker/waffle,chadversary/waffle,evelikov/waffle,maurossi/waffle,janesma/waffle,yinquan529/waffle-gl-waffle,yinquan529/waffle-gl-waffle,waffle-gl/waffle,maurossi/waffle,fjhenigman/waffle,evelikov/waffle