[ANNOUNCE] libdrm 2.4.20

[Jesse Barnes]

New version includes a few fixes relative to 2.4.19.

Ben Skeggs (4):
      nouveau: remove unused field from nouveau_bo
      nouveau: fix segfault in nouveau_bo_new_tile() failure path
      nouveau: fix annoying compiler warning
      Fix pkgconfig includes for /usr/include/drm

Chris Wilson (2):
      intel: Propagate some more error returns
      intel: Repeat execbuffer if interrupted by signal

Eric Anholt (3):
      intel: Only align Y-tiling pitch to the Y tile width.
      intel: Align untiled buffer pitch to 64B.
      intel: Install the header file in the libdrm/ directory.

Francisco Jerez (4):
      nouveau: Update nouveau_class.h.
      nouveau: Small lighting related addition to nouveau_class.h.
      nouveau: Fix up the stride of NV20TCL_LIGHT_BACK_*.
      nouveau: Regenerate nouveau_class.h.

Jerome Glisse (1):
      drm/radeon: tab/whitespace cleanup

Jesse Barnes (2):
      modetest: add optional select codepath
      libdrm: bump version number to 2.4.20 for release

Julien Cristau (3):
      libdrm_intel.pc: don't include ${includedir}/drm
      libdrm_nouveau requires libdrm
      Install headers to $(includedir)/libdrm

Pauli Nieminen (4):
      libdrm: Move intel_atomic.h to libdrm core for sharing.
      libdrm_radeon: Optimize cs_gem_reloc to do less looping.
      libdrm: Fix error message if libdrm_intel|radeon is disabled and there is no atomic ops.
      Check HAVE_RADEON only after checking for atomic operations.

git tag: 2.4.20

http://dri.freedesktop.org/libdrm/libdrm-2.4.20.tar.bz2
MD5:  3c56e03172b236e14905ef9a68ba2f97  libdrm-2.4.20.tar.bz2
SHA1: f1448ac0f1c7a5f74a86d2fb50941fc12dc932db  libdrm-2.4.20.tar.bz2

http://dri.freedesktop.org/libdrm/libdrm-2.4.20.tar.gz
MD5:  dcbf9aa0497c84c7e4af15adb0021955  libdrm-2.4.20.tar.gz
SHA1: e492e292df048566f910244bf5e0a9a8f07039b6  libdrm-2.4.20.tar.gz