Use gcc instead of apple-gcc42 when needed.
Migrate apple-gcc42 back to homebrew/versions.

Closes #28418.
ghc: update bottle to use new GCC formula.
OpenOCD devel 0.8.0-rc2

Closes #28639.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
open-ocd: hoist pkg-config dep
gifsicle 1.83

Closes #28638.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
go 1.3beta1

Closes #28636.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
x264: r2412 in stable and r2431 in devel
go: update 1.2.1 bottle.
x264: update r2412 bottle.