buildroot

tekui: add missing dependency on dynamic library

tekui selects a bunch of Lua modules, which are only available when
!BR2_STATIC_LIBS, so add this missing dependency.

Fixes:

   http://autobuild.buildroot.net/results/0c8ae60a7c0dfb64ee12d557b1660a4a1fc84703/

While we're at it, use the lower-case name of the package in the
Config.in comment.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>