kernel: fix x86 objdump invocation on 3.14 and 3.18

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43557 3c298f89-4303-0410-b956-a3cf2f4a3e73
x86: rename */config-3.10 to */config-default

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43558 3c298f89-4303-0410-b956-a3cf2f4a3e73
x86: update to linux 3.14

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43559 3c298f89-4303-0410-b956-a3cf2f4a3e73