build: avoid build failure without gnutls
build: avoid build failure without gnutls

Found while trying to cross-compile to mingw:

  CC       libvirt_driver_remote_la-remote_driver.lo
../../src/remote/remote_driver.c: In function 'doRemoteOpen':
../../src/remote/remote_driver.c:487:23: error: variable 'verify' set but not used [-Werror=unused-but-set-variable]

* src/remote/remote_driver.c (doRemoteOpen): Also ignore 'verify'.

Signed-off-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

cbosdo/libvirt,nertpinx/libvirt,zippy2/libvirt,taget/libvirt,shugaoye/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,olafhering/libvirt,datto/libvirt,datto/libvirt,agx/libvirt,datto/libvirt,eskultety/libvirt,jardasgit/libvirt,zippy2/libvirt,shugaoye/libvirt,shugaoye/libvirt,taget/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,VenkatDatta/libvirt,olafhering/libvirt,libvirt/libvirt,andreabolognani/libvirt,eskultety/libvirt,andreabolognani/libvirt,elmarco/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,taget/libvirt,datto/libvirt,jfehlig/libvirt,andreabolognani/libvirt,rlaager/libvirt,crobinso/libvirt,libvirt/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,rlaager/libvirt,agx/libvirt,rlaager/libvirt,datto/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,eskultety/libvirt,crobinso/libvirt,libvirt/libvirt,andreabolognani/libvirt,cbosdo/libvirt,agx/libvirt,VenkatDatta/libvirt,crobinso/libvirt,shugaoye/libvirt,elmarco/libvirt,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,libvirt/libvirt,VenkatDatta/libvirt,zippy2/libvirt,shugaoye/libvirt,taget/libvirt,rlaager/libvirt,taget/libvirt,eskultety/libvirt,olafhering/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,agx/libvirt,cbosdo/libvirt,jardasgit/libvirt,zippy2/libvirt,jardasgit/libvirt,jfehlig/libvirt,elmarco/libvirt,crobinso/libvirt,agx/libvirt,eskultety/libvirt,olafhering/libvirt,jfehlig/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,elmarco/libvirt,rlaager/libvirt