Don't install bundled libzip

Apart from header installation, which is done by
third-party/CMakeFiles.txt, installation of the bundled libzip is not
necessary, since it is statically linked. In fact, installation can
cause a previously installed version to be used in preference to the
version in the source tree, which is harmful in itself. It can also mess
up the -I flags for the rest of HHVM; see
https://github.com/facebook/hhvm/issues/3089 for details.
Merge pull request #16 from tstarling/dont-install-libzip

Don't install bundled libzip
Fixed wrong libzip version

Indeed the version is 0.11.2
Update cmake-zipconf.h.in
Merge pull request #17 from reeze/patch-1

Fixed wrong libzip version
Remove unused code.
Merge pull request #19 from dcsommer/master

Remove unused code.
Fix HHVM OSS build ... Need to bring back Time.h since Acceptor.cpp still uses it
Move proxygen to top level.
Merge pull request #21 from dcsommer/master

Move proxygen to top level
Replace C++11 TR1 references from Thrift code with their non-prefixed equivalents
Thrift: fix wrong strerror_r declaration on OS X

This is using the same check as Folly is doing in String.cpp
Merge pull request #22 from mcuelenaere/thrift-tr1-removal

Replace C++11 TR1 references from Thrift code with their non-prefixed equivalents
Merge pull request #23 from mcuelenaere/fix_sterror_r_osx

Thrift: fix wrong strerror_r declaration on OS X
Update folly remote