development/zope.interface: Fixed for bash4.

development/zope.interface/zope.interface.SlackBuild

@@ -33,9 +33,8 @@ find . \
 
 python setup.py install --root=$PKG
 
-( cd $PKG
-  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
-)
+find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
 
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 cp -a CHANGES.txt PKG-INFO README.txt $PKG/usr/doc/$PRGNAM-$VERSION