meta-tizen: message-port: Prevent running ldconfig if not on system

meta-tizen: message-port: Prevent running ldconfig if not on system

Without this change,
bitbake tries to run ldconfig on host instead
and then complains (but not fail !) about permission issue like :

   /sbin/ldconfig.real: \
   Can't create temporary cache file /etc/ld.so.cache~: \
   Permission denied

Note, "or condition" is prefered because of shell's -e option.

Change-Id: I0f1c9b6389ed37cccf6ad9d2a6bf77966043f2da
(From meta-tizen rev: 34fe05b1b2c0258c570cf77d05c9ab6ef56fa49d)
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>