libdrm: update to 2.4.22.

srcpkgs/libdrm/template

@@ -1,13 +1,13 @@
 # Template build file for 'libdrm'.
 pkgname=libdrm
-version=2.4.21
+version=2.4.22
 distfiles="http://dri.freedesktop.org/libdrm/$pkgname-$version.tar.bz2"
 build_style=gnu_configure
 configure_args="--enable-udev --enable-vmwgfx-experimental-api
 --enable-nouveau-experimental-api"
 short_desc="Userspace interface to kernel DRM services"
 maintainer="Juan RP <xtraeme@gmail.com>"
-checksum=4e1b612ba3b6b1deae4a8c14946099283e7a00e48a5ab002eaf4312f5a8ba14b
+checksum=0bb0e594e4094d9000d80f38e96e8f640b6364f96cfef5b970cf4481443c6b3d
 long_desc="
  This package provides a library which offers a userspace interface
  to kernel DRM (Direct Rendering Manager) services for access to
@@ -16,6 +16,13 @@ long_desc="
 subpackages="$pkgname-devel"
 Add_dependency run glibc
 Add_dependency run libudev
+Add_dependency build automake
 Add_dependency build pkg-config
 Add_dependency build glibc-devel
 Add_dependency build libudev-devel
+
+pre_configure()
+{
+	cd ${wrksrc} && libtoolize -f && aclocal && autoconf && automake \
+		|| return 1
+}