Install Linux 3.12 from Debian testing.

Note that:

* linux-compiler-gcc-4.8-x86 is needed to install linux-headers-3.12-*
* linux-kbuild-3.12 is only available from sid right now

auto/config

@@ -35,7 +35,7 @@ $RUN_LB_CONFIG \
    --memtest none \
    --packages-lists="standard" \
    --tasks="standard" \
-   --linux-packages="linux-image-3.10-3" \
+   --linux-packages="linux-image-3.12-1" \
    --syslinux-menu vesamenu \
    --syslinux-splash data/splash.png \
    --syslinux-timeout 4 \

config/chroot_apt/preferences

@@ -259,6 +259,10 @@ Package: linux-base
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
+Package: linux-compiler-gcc-4.8-x86
+Pin: release o=Debian,a=testing
+Pin-Priority: 999
+
 Package: linux-headers-486
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
@@ -271,19 +275,19 @@ Package: linux-headers-amd64
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-headers-3.10-3-common
+Package: linux-headers-3.12-1-common
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-headers-3.10-3-486
+Package: linux-headers-3.12-1-486
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-headers-3.10-3-686-pae
+Package: linux-headers-3.12-1-686-pae
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-headers-3.10-3-amd64
+Package: linux-headers-3.12-1-amd64
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
@@ -299,20 +303,20 @@ Package: linux-image-amd64
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-image-3.10-3-486
+Package: linux-image-3.12-1-486
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-image-3.10-3-686-pae
+Package: linux-image-3.12-1-686-pae
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-image-3.10-3-amd64
+Package: linux-image-3.12-1-amd64
 Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
-Package: linux-kbuild-3.10
-Pin: release o=Debian,a=testing
+Package: linux-kbuild-3.12
+Pin: release o=Debian,a=unstable
 Pin-Priority: 999
 
 Package: laptop-mode-tools