Revert "When doing the distcheck cmake check only verify that cmake runs, don't verify that it can build Wireshark."

This change doesn't help: we can't get cmake to run properly.

This reverts commit 956f4423df447f2e7c0f9691ba9928f104d79820.

Change-Id: If1c0ec13ff35fdaa266dcd491350477e2bd91bd1
Reviewed-on: https://code.wireshark.org/review/3459
Reviewed-by: Jeff Morriss <jeff.morriss.ws@gmail.com>