build: don't include tests in released tarball

Do not include all our .t test files in releases. Skip
iptables-tests.py script as well.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/Makefile.am b/Makefile.am
index c38d360..275ebc3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -21,7 +21,7 @@
 	rm -Rf /tmp/${PACKAGE_TARNAME}-${PACKAGE_VERSION};
 	pushd ${top_srcdir} && git archive --prefix=${PACKAGE_TARNAME}-${PACKAGE_VERSION}/ HEAD | tar -C /tmp -x && popd;
 	pushd /tmp/${PACKAGE_TARNAME}-${PACKAGE_VERSION} && ./autogen.sh && popd;
-	tar -C /tmp -cjf ${PACKAGE_TARNAME}-${PACKAGE_VERSION}.tar.bz2 --owner=root --group=root ${PACKAGE_TARNAME}-${PACKAGE_VERSION}/;
+	tar --exclude=*.t --exclude=iptables-test.py -C /tmp -cjf ${PACKAGE_TARNAME}-${PACKAGE_VERSION}.tar.bz2 --owner=root --group=root ${PACKAGE_TARNAME}-${PACKAGE_VERSION}/;
 	rm -Rf /tmp/${PACKAGE_TARNAME}-${PACKAGE_VERSION};
 
 config.status: extensions/GNUmakefile.in \