mariadb: Patch to compile on OS X.

* perl is required at build time on darwin. Copied from the
  mysql/5.5.x.nix

* CMake on darwin creates shared libraries with relative 'install_name'
  paths which are made absolute by fixDarwinDylibNames.

  See http://answers.opencv.org/question/4134/cmake-install_name_tool-absolute-path-for-library/

* The asm patch was needed to compile on darwin, though I do not
  understand what is going on. Error before the patch:

  [ 15%] Building C object mysys/CMakeFiles/mysys.dir/my_context.c.o
  .../nix-build-mariadb-10.0.13.drv-1/mariadb-10.0.13/mysys/my_context.c:207:Unknown pseudo-op: .cfi_escape
  .../nix-build-mariadb-10.0.13.drv-1/mariadb-10.0.13/mysys/my_context.c:207:Rest of line ignored. 1st junk character valued 48 (0).
  make[2]: *** [mysys/CMakeFiles/mysys.dir/my_context.c.o] Error 1
Fix K3D patching and cmake-configuration phases
Merge pull request #2453 from pmahoney/mariadb-osx

MariaDB on OS X
Add missing libXmu dependency
Julia 0.3.0 seems to have no more problems than 0.2.1, so make it default
backintime: a simple backup tool
pypyPackages.random2: disable tests
fix eval
mesos: fix build
pypy: compile also curses
Disable Xen kernel builds

Xen itself is currently broken in Nixpkgs, so building kernels for it
is kind of pointless.
lttng-modules: Mark as broken

These do not build for any kernel:

  http://hydra.nixos.org/eval/1149989?filter=lttng&compare=1149981
Remove numerous failing kernel packages from Hydra

  http://hydra.nixos.org/eval/1149989?filter=linuxPackages
Add xar
suitable clang stdenv
wip libc++
livcxx build
X11 build purity
build ghc with older binary where possible
mark nixUnstable as broken on darwin