rust: fix compilation for Mountain Lion/clang 4.1

Should be fixed in next release of rust:
https://github.com/mozilla/rust/commit/25bc65b487cecd3c7712d05fb1c5707982bf6f89

Closes #15143.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gsettings-desktop-schemas: depends on pkg-config

Fixes #15145.
gsettings-desktop-schemas: fix dependencies

Add explicit build-time dependencies on some tools so that superenv puts them in the path.
(And also so they'll be installed because they are needed!)

Fixes #15145.
monotone: fix botan checksum

Closes #15146.
Percona Toolkit 2.1.4

Closes #15142.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
smlnj: detect Mountain Lion correctly

Closes #15149.
Presumably fixes #12143.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
transmission 2.71

Closes #15151.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
frege 3.19.112a

Closes #15148.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
SquashFS: 4.2 and add LZO,XZ support.

Closes #14863.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
FileUtils: backport #copy_metadata fix

Entry_#copy_metadata has a nasty bug that makes copying symlinks
across filesystems fail. This lasted all the way through 1.9.3p194
before *finally* being fixed. This backports the official fix.

Fixes #14710.
RDSCli 1.10.002

Closes #15158.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
AIR SDK v3.4

Closes #15154.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
aws-sns-cli 2012-03-31

Closes #15157.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
py2cairo: add `env :std`

py2cairo needs the PATH environment variable to locate
`python-config` and by extension the Python the user
wants to use.

- Add `env :std` for now until a system-wide solution is used.

Fixes #14781

Closes #15159.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
RabbitMQ 2.8.7

Closes #15160.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libpng 1.5.13

Closes #15162.
gd: don't use freetype unless requested.

Try and work around the issue in #15133.
fakeroot: add missing dependencies

Fixes #15136.
boost 1.51.0

Closes #15113.
When builds fail verbosely, be verbose