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.

Add qemu package

Remove .gitignore

update gettext to 0.19.8.1 and add source compile method.

Update ruby to 2.4.1

Update flex to 2.6.4 and change to strip binaries

Update less to 487 and change to install stripped less.

Add txt2man package

Fix no implicit conversion of nul into String error

Add /usr/lib64 to VPATH to make traceroute compilable on x86_64.

Add unzip dependency to neovim

Change all toolcain to use stripped binaries and libraries

  - Fix /usr/local/bin/crew:67:in `+': no implicit conversion of nil into
    String (TypeError) with 'crew build', 'crew install' and 'crew install'
    commands if no package is provided.
  - Fix notice 'Package  isn't installed.' with 'crew remove' if no package is provided.

update patch to 2.7.5 and change to install stripped patch