gcc 4.8.3

Update to latest stable release.

Closes #29507.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
gcc: update 4.8.3 bottle.
rtorrent: 0.9.4 no longer uses libsigc++

Closes #29515.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
hub 1.12.1

Closes #29514.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
media-info 0.7.69

Update to latest stable release, update homepage link, change single
quotes to double.

Closes #29509.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
fetch-crl 3.0.13

Closes #29520.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Replace last uses of :freetype and :fontconfig deps
Update the mit-scheme recipe to 9.2.

This pull request updates the mit-scheme formula to the new stable
version of mit-scheme.
mit-scheme: add 9.2 bottle.