mesa: upgrade to 9.1.3

mesa: upgrade to 9.1.3

Merge mesa-PV.bb and mesa-PV.inc as the is no point to the split now we're only
building one variant of Mesa.

Drop 0002-cross-compile.patch isn't needed as libtool is used instead of mklib.
However, as libtool is used instead of mklib add fix-glsl-cross.patch to work
around build failures caused by the cross libtool being used to build host
binaries.

Add EGL-Mutate-NativeDisplayType-depending-on-config.patch to build correctly in
a non-X11 environment.

Drop dont-fail-if-libX11-isnt-installed.patch and
fix-egl-compilation-without-x11-headers.patch as they were backports.

license.html had some formatting and typo fixes, update the checksum.

(From OE-Core rev: d7033f4441183e53bf7fc8aa2293a9ec156a28dd)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>