Fix package build (again)
Fix package build (again)

Before downloading dependencies we have to source environ so that
the environment for mono is correctly set up. However, on the
package builder build agent we don't have (and don't want to have)
libfieldworks-fdo installed, so we have to exclude the pkg-config
call.

sillsdev/LfMerge,sillsdev/LfMerge,ermshiperete/LfMerge,sillsdev/LfMerge,ermshiperete/LfMerge,ermshiperete/LfMerge