LazyFetch: allow setting the cmake generator

Allow configuring the CMake generator used for external components. By
default use the generator the main project is using.
For details see the documentation in tools/cmake/common/LazyFetch.cmake.

Change-Id: Ie01ea1ae533cf7a40c1f09808de2ad2e83a09db3
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
1 file changed