libtool: install into staging

libtool provides libltdl, so install it into staging to make it usable
by other packages.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
(cherry picked from commit 1b99a279565fb10c59b93c41f30c8bb835d63331)
configs/amlogic_xios_m3-xbmc_defconfig

[aml] sync m3 kernel, drivers/amlogic/amports update
[aml] sync xbmc version, pickup mpeg2 aspect ratio tracking, silence debug spew and alsa buffer size changes
[aml] dump libamplayer-m1 version, build fix
[aml] sync m3 kernel, pickup amhdmitx udev events
[aml] sync xbmc, pickup defaulted res if no display present