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

meta-tizen: gumd: 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: Ie211954bfb1753a8fa7d450caa653c1e03a99d63
(From meta-tizen rev: 0dbe39ac0ee3899efb15608feab593fb4752b88c)
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>