darwin.Libc: stop vendoring headers from other packages

A number of headers in Libc are being vendored from other packages.
Instead of copying them from an earlier Libc, Libsystem now sources them
from their respective packages (see below). This allows Libc_old to be
dropped and avoids any potential clashes when building Libsystem.

libmalloc:
* malloc/malloc.h

libplatform:
* setjmp.h
* ucontext.h
* libkern/OSAtomic.h
* libkern/OSCacheControl.h

libpthread:
* pthread*.h
* sched.h
* spawn.h

syslog (vendored because only one file is needed):
* asl.h

xnu:
* spawn.h (a different one from libpthread)
* libproc.h

1 files changed, 0 insertions, 1 deletions

diff --git a/pkgs/os-specific/darwin/apple-source-releases/default.nix b/pkgs/os-specific/darwin/apple-source-releases/default.nix
index a277ebfd580f0..ab13e91e37354 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/default.nix
@@ -266,7 +266,6 @@ developerToolsPackages_11_3_1 // macosPackages_11_0_1 // {
         rev    = "Libc-997.90.3";
         hash   = "sha256-B18RNO+Rai5XE52TKdJV7eknosTZ+bRERkiU12d/kPU=";
       };
-      Libc_old        = applePackage "Libc/825_40_1.nix" "osx-10.8.5"      "sha256-JvPSY7FzraGpqF/jYLfhU2o/2195NuKrXsryYfVtx3s=" {};
     };
     libclosure      = applePackage "libclosure"        "osx-10.11.6"     "sha256-L5rQ+UBpf3B+W1U+gZKk7fXulslHsc8lxnCsplV+nr0=" {};
     libdispatch     = applePackage "libdispatch"       "osx-10.10.5"     "sha256-jfAEk0OLrJa9AIZVikIoHomd+l+4rCfc320Xh50qK5M=" {};