Create more archives with 0install.sh script

 + Add tarball and tar (by keep it after compression). These format are
 efficient (or not at all) in term of compression, but are more common
 than tar.xz. They are blazing fast to produce too.

0install.sh

@@ -41,14 +41,16 @@ tar_name=${name}.tar
 tar -cvaf ${tar_name} $name >> $dbg_log
 
 echo "========= Creating first archive ========="
-coproc lzma -f -9 ${tar_name} >> $dbg_log
+coproc lzma -kf -9 ${tar_name} >> $dbg_log
+coproc gzip -kf -9 ${tar_name} >> $dbg_log
 
 # Create stripped archive
 tar_name_stripped=${name}_stripped.tar
 strip $final_binary_path
 tar -cvaf ${tar_name_stripped} $name >> $dbg_log
 echo "========= Creating second (stripped) archive ========="
-coproc lzma -f -9 ${tar_name_stripped} >> $dbg_log
+coproc lzma -kf -9 ${tar_name_stripped} >> $dbg_log
+coproc gzip -kf -9 ${tar_name_stripped} >> $dbg_log
 
 # Wait for the detached compression process  to finish
 # (see lines starting with 'coproc')