Revert the revert of #3466 (Meterpreter binaries gem)

This reverts commit 9b35b0e13a7816cf7aea9d31d1cc36027e7718fc.

This should not land on master until the Metasploit Pro folks (@trosen-r7 and friends) get their Meterpreter path specifications working the same way as Framework's does. IOW, one of those folks should land this.

See rapid7#3466 for details. (The commit message mistakenly mentions rapid7#3446)