added rule to make tgz tarball
added rule to make tgz tarball

mbechard/libsquish,siavee/libsquish,mantheman/libsquish,zjhlogo/libsquish,cococo111111/libsquish,robhshu/libsquish,mycheckgithub/libsquish,hlhtddx/libsquish,zjhlogo/libsquish,siavee/libsquish,milkysunshine91/libsquish,cococo111111/libsquish,mycheckgithub/libsquish,mycheckgithub/libsquish,derekbradley/libsquish,hlhtddx/libsquish,mantheman/libsquish,mantheman/libsquish,hlhtddx/libsquish,robhshu/libsquish,milkysunshine91/libsquish,siavee/libsquish,DustinGuoSZ/libsquish,derekbradley/libsquish,milkysunshine91/libsquish,robhshu/libsquish,cococo111111/libsquish,DustinGuoSZ/libsquish,siavee/libsquish,mbechard/libsquish,mbechard/libsquish,derekbradley/libsquish,zjhlogo/libsquish,DustinGuoSZ/libsquish