Revert "kernel: update to 3.5.0."

This reverts commit b6defc652f.

The build server and its guests are suffering massive performance slowdowns
and I had to add tweaks to make the guests uses the right clock source.

So let's bring back 3.4.6 which was perfectly stable.

srcpkgs/kernel/template

@@ -1,14 +1,12 @@
 # Template file for 'kernel'
 #
 pkgname=kernel
-_kmajor=3.5
-_kpatch=0
-version="${_kmajor}.${_kpatch}"
+version=3.4.6
 revision=1
 nostrip=yes
 noverifyrdeps=yes
 preserve=yes
-wrksrc="linux-${_kmajor}"
+wrksrc="linux-${version}"
 depends="dracut linux-firmware module-init-tools"
 makedepends="perl kmod"
 subpackages="kernel-headers"
@@ -19,8 +17,8 @@ license="GPL-2"
 short_desc="The Linux kernel and modules"
 long_desc="
  This package provides the linux kernel image and associated modules."
-distfiles="http://www.kernel.org/pub/linux//kernel/v3.x/linux-${_kmajor}.tar.xz"
-checksum=b985ce383f0cfd940d988d4c99a84899028327aca8c29b420678241f26fdb342
+distfiles="http://www.kernel.org/pub/linux//kernel/v3.x/linux-${version}.tar.xz"
+checksum=50d6084b3058c376e2436b0a1ac9bc4098a59129403dd4748b17e04e2ac2020c
 
 _kernver="${version}_${revision}"