docs: drop most autoconf references

There's still a few in here, but those docs are already so out of date
that it probably makes more sense to delete them. Such as the GLES
docs which still claim we only support 1.1 and 2.0, with no mention of
3.x at all.

v2: - Add docs for testing back end (Eric Engestrom)
    - Drop more autootols references
    - meson is now required not recommended
    - Add $PWD

Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Acked-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Matt Turner <mattst88@gmail.com>

docs/vmware-guest.html

@@ -191,9 +191,9 @@ For 64-bit Fedora systems:
 <li>Build libdrm:
   <pre>
   cd $TOP/drm
-  ./autogen.sh --prefix=/usr --libdir=${LIBDIR}
-  make
-  sudo make install
+  meson builddir --prefix=/usr --libdir=${LIBDIR}
+  ninja -C builddir
+  sudo ninja -C builddir install
   </pre>
 <li>Build Mesa and the vmwgfx_dri.so driver, the vmwgfx_drv.so xorg driver, the X acceleration library libxatracker.
 The vmwgfx_dri.so is used by the OpenGL libraries during direct rendering,
@@ -204,9 +204,9 @@ copy and video acceleration:
 The following configure options doesn't build the EGL system.
   <pre>
   cd $TOP/mesa
-  ./autogen.sh --prefix=/usr --libdir=${LIBDIR} --with-gallium-drivers=svga --with-dri-drivers=swrast --enable-xa --disable-dri3 --enable-glx-tls
-  make
-  sudo make install
+  meson builddir --prefix=/usr --libdir=${LIBDIR} -Dgallium-drivers=svga -Ddri-drivers=swrast -Dgallium-xa=true -Ddri3=false
+  ninja -C builddir
+  sudo ninja -C builddir install
   </pre>
 
 Note that you may have to install other packages that Mesa depends upon