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

meta-tizen: murphy: 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: I2ae3467c0f0e8b5b620d1772774771e3c33774ae
(From meta-tizen rev: 759339cc168638291a5e1ab3f82b6b403786907d)
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>