package/ushare: fix NLS build

Commit c4e1a075 forgot to add
--enable-nls to patch resulting in the following build failure:

Unknown option "--enable-nls".

Fixes:
 - http://autobuild.buildroot.org/results/6ab2555b419355f01310f230fe612f2a3699bbfd



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>