Bugfix to BerkeleyGW interface: calls to gk_sort are replaced with reads from iunigk. For some k-points gk_sort generates different igk on every call which causes inconsistent data written to BerkeleyGW files.

git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@11220 c92efa57-630b-4861-b058-cf58834340f0