samaba36: do not build libtevent

This fixes a build error on some mips systems.

This closes #15769.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40652 3c298f89-4303-0410-b956-a3cf2f4a3e73