This update for expect fixes the following issues:

- Fixed an issue when expect in permanently open connection causes hanging for scripts. (bsc#1183904)
- pass explicit -pie flag to CFLAGS and hack `make` invocation so that
/usr/bin/expect actually becomes a PIE binary. This is especially awkard
since the expect build system implicitly passes -fPIC which breaks our
gcc-PIE package, but does not pass -pie while linking the executable.
Shared libraries are also not linked with -shared so we need to explicitly
pass this, too, to avoid build breakage. (bsc#1184122)
- Add an unversioned symlink to make linking easier for applications that use libexpect without Tcl. (bsc#1172681)

This update was imported from the SUSE:SLE-15:Update update project.