nginx 1.4.3

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
nginx: devel 1.5.6

Closes #23130.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
youyube-dl 2013.10.07

Closes #23129.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
lilypond devel 2.17.28

Closes #23121.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
flowgrind 0.6.1

Closes #22842.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gmp: fix build on libc++ / clang on 10.9

Fixes #21259.
brew-test-bot: use REXML to write JUnit file.
detect_cxx_stdlibs: Only detect for dylibs

Fixes #23115.