Change perl.rb to add source compile method and strip binaries

Update readline to 6.3p8

Add readline7.rb to install readline 7.0p3

Add help command

Add unbound to gnutls

Correct dependencies

Enable xsl in php5 package

Enable xsl in php7 package

Update gdbm to 1.13.

Update filecmd.rb to 5.31 and strip binary and library

Change r.rb to update it to 3.4.0 and correct dependencies to solve #668

Strip binaries and libraries from several packages

Add patchutils package

Add bashdb package

Add gnupg

Fix gnutls package

Add check method which works on x86_64 correctly.
Unfortunately, it causes problem on armv7l.
Also change to strip binaries.

Also change to strip binary and libraries.

Change to strip binary and library too.