Create special tvheadend-armv6l and tvheadend-dbg-armv6l packages

Fixes: #1665

Author: Flole998

Autobuild/armv6l.sh

@@ -1 +1,4 @@
 AUTOBUILD_CONFIGURE_EXTRA="${AUTOBUILD_CONFIGURE_EXTRA:-} --arch=armel"
+sed -i -E '/-armv6l$/! s/^Package: (.*)(-armv6l)*$/Package: \1-armv6l/g' debian/control
+sed -i -E 's/^Depends: tvheadend/Depends: tvheadend-armv6l/g' debian/control
+sed -i -E '/armv6l/! s/package=tvheadend([^ ]*)/package=tvheadend\1-armv6l/g' debian/rules