Fix issue #840 erroneous readelf -d output.
Merge pull request #841 from pmienk/master

Fix issue #840 erroneous readelf -d output.
Problem: Can't install czmq.7

Searching for czmq.7 in srcdir while it is generated in buildir. Fixed
by removing srcdir and change submitted to zproject:
https://github.com/zeromq/zproject/pull/101
Merge pull request #843 from miska/master

Problem: Can't install czmq.7