GBE: fix terminfo library linkage

GBE: fix terminfo library linkage

In some distros, the terminal libraries are divided into two
libraries, one is tinfo and the other is ncurses, however, for
other distros, there is only one single ncurses library with
all functions.
In order to link proper terminal library for LLVM, find_library
macro in cmake can be used. In this patch, the tinfo is prefered,
so that it wouldn't affect linkage behavior in distros with tinfo.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Reviewed-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>