LazyFetch: add verbose build support

Extend LazyFetch to allow building external components in verbose
mode to help debugging issues. Both the configuration phase and the
build pase can be made versbose with cmake or environemnt variables.
For details see tools/cmake/common/LazyFetch.cmake.

Change-Id: Ifa13904cf5692778cc1b1d56757e4c95539fc24a
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
1 file changed