CircleCI: Store artifacts [Linux]

Dockerfile: Fix rake [Linux]

Fix the error:
brew audit
==> Installing or updating 'rubocop' gem
/usr/bin/ruby2.3: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake (LoadError)

safe_fork: Improve the error message [Linux] (Linuxbrew#473)

Install bzip2 if required to decompress bz2 files for Linuxbrew (Linu…

…xbrew#462)

Merge tag Homebrew/1.2.6 into Linuxbrew/master

Conflicts:
	CONTRIBUTING.md
	Library/Homebrew/os.rb
	README.md

test: Add python executable to the PATH for Linuxbrew (Linuxbrew#443)

Add the `python` executable to the PATH if the formula requires Python.

Fix failing Java tests for Linuxbrew

With Linuxbrew, the expected value is currently nil.
This may change when Homebrew and Linuxbrew converge,
but this is out of the scope for this change.

README.md: Add PATH to the shell profile for Linuxbrew (Linuxbrew#421)

Modify either ~/.bash_profile or ~/.profile as appropriate.

Add Michka Popoff to the maintainers list for Linuxbrew (Linuxbrew#413)

BottleLoader: Fix installing a bottle from an URL (Linuxbrew#404)

The name of the formula is not extracted correctly
when the URL includes a hyphen.