buildsys: fix make release target
buildsys: fix make release target

According to git man page the syntax for git archive should have
the <tree-ish> as last argument. Indeed using git 1.5.5.6 the tarball
was not properly created. Newer version (i.e. 1.6.3.3) works fine even if
HEAD comes before other option. For backward compatibility use a syntax
that is fine with older git.

Signed-off-by: Carmelo Amoroso <532378793705a04edd56deb76ad8c0442834d55d@st.com>

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc