brcm63xx: update LINUX_VERSION to 3.10.32

Missed from the previous comit.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39708 3c298f89-4303-0410-b956-a3cf2f4a3e73