Merge remote-tracking branch 'origin/master' into stdenv-updates.
gcc: update from 4.8.0 to 4.8.1
glibc: Enable kernels down to 2.6.32 (required for RHEL 6).
glibc: add "/run/current-system/sw/bin" to the default search path returned by "getconf CS_PATH"
Merge pull request #586 from peti/fix-default-search-path-in-getconf

glibc: add "/run/current-system/sw/bin" to the default search path returned by "getconf CS_PATH"
add "quilt" (patch manager)
kernel/generic: pass through prePatch as well
new package: "linux-lts-3.0"

Long term support kernels:
http://ltsi.linuxfoundation.org/what-is-ltsi
new package: "linux-lts-3.4"

Long term support kernels:
http://ltsi.linuxfoundation.org/blog/2013-01-22/ltsi-v3.4-released
default kernel: upgrade to 3.4 lts
linux headers 3.4 lts - needs refactoring
switch to 3.4lts headers
glibc: make minimum supported kernel version configurable

The minimum we support is 3.2.43 which is nixos' default kernel in
master. On every stdenv-updates merge, we will move this number up to
the previous latest default kernel.

for people who want older kernels, a "compat" setting (headers +
glibc) will soon appear