MFH: r404314

• Update to 2.0.0p648
• Add LICENSE_FILE
• Use USES=autoreconf instead of USE_AUTOTOOLS=autoconf
• Use USES=libedit
• Use USES=tar:xz
• Silence patch and build messages

Changes: https://www.ruby-lang.org/en/news/2015/12/16/ruby-2-0-0-p648-released/

		http://svn.ruby-lang.org/repos/ruby/tags/v2_0_0_648/ChangeLog

Security: 3b50881d-1860-4721-aab1-503290e23f6c
Differential Revision: https://reviews.freebsd.org/D4668
PR: 205487
Exp-run by: antoine

Approved by: ports-secteam (feld)