ruby: add rubygems customization, fix postinstall

This configures rubygems to install all gems into a public, non-versioned
directory by default - both gems and their binaries. (This means that
users no longer need /usr/local/opt/ruby/bin in their PATH.)

This means that we no longer have to monkey with gem directories at all
in postinstall. Bundled gems will be symlinked into this location.

Fixes #29982.
Closes #29986.
ruby: set site_ruby and vendor_ruby at build
ruby: update 2.1.2_2 bottle.

Closes #30129.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
go devel 1.3rc2

Closes #30138.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
influxdb 0.7.3

Closes #30134.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
influxdb: update 0.7.3 bottle.
wine --devel 1.7.20

Closes #30127.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>