Remove obsolete fallback for broken Xcode 4.3+

After recent cleanups the code in this branch should be unreachable, so
there is little point in keeping it around.
Simpler Xcode prefix detection code
doctor: use Xcode.bundle_path
cantera: use ENV.append
libtomcrypt: use ENV.append
spidermonkey: drop really old workaround

This was added in 2009 to a completely different version of the formula.
twemcache: use ENV.append
hercules --HEAD

Closes #28922.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mailutils 2.2

Closes #28893.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mercurial 3.0

Closes #28916.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Fix for String#undent

Without it, String#undent would fail on unindented strings, e.g.:

    "foo".undent

NoMethodError: undefined method `length' for nil:NilClass`

Closes #28873.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
clutter-gst 2.0.10

Closes #28886.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
heroku-toolbelt 3.7.2

Update Heroku Toolbelt to 3.7.2

Closes #28486.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Use parameter expansion to avoid forking
Quote argument to readlink
groovy --devel 2.3.0-rc-4

Closes #28923.

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

Fixes #28814.
Closes #28883.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
influxdb 0.6.0
influxdb: update 0.6.0 bottle.

Closes #28926.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
unoconv 0.6

Closes #28879.

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