ipkg-build calls 'find' directly irrespective of the platform,

ipkg-build calls 'find' directly irrespective of the platform,
this causes failure in case gnu-find specific options are used
(such as "-uid +99").

The attached diff, which creates tools/ipkg-utils/patches/160-find.patch,
fixes the problem by using gfind is available. Again, this is similar
to what is done in include/host.mk. (#3868)

Signed-off-by: Luigi Rizzo <rizzo@iet.unipi.it>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12247 3c298f89-4303-0410-b956-a3cf2f4a3e73