meta-tizen: festival: Prevent running ldconfig if not on system

meta-tizen: festival: 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: I2de3d79aef7c884727f91538ff3ac73babb07125
(From meta-tizen rev: 317bfee66280e5dfdbc014fb38ceb0edc95faeca)
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>