Works around CURL build failure because cmake insists on using
/usr/include/zlib.h.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1898

Without this, the AMD64 build installs to "lib64/" which then cannot
be found by CURL.

    
We do not need "make" dependencies for one-time builds.

This is needed to build libFLAC which uses ftello().