xz: swap mirrors

Upstream is being hammered by Homebrew users. Would like to have less traffic.

Closes #21419.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
android sdk 22.0.4

Closes #21416.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Virtuoso 6.1.7

Closes #21400.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
remctl: update URL

Closes #21410.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Multimarkdown 4.2

Closes #21407.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
aria2: fix compilation on Clang 5

Closes #21356.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>