newapkbuild: move checksum call to after fetch

unpack will no longer unpack without a checksum, even with -f.  This
means that newapkbuild will not be able to deduce what kind of build
system is contained within, so the templates for CMake, Perl, etc are
never used.

This patch ensures checksumming is done right after fetch, so that
unpack works properly.

newapkbuild.in

@@ -228,7 +228,7 @@ subpackages="\$pkgname-dev \$pkgname-doc"
 source="$source"
 __EOF__
 
-	abuild -f fetch unpack
+	abuild -f fetch checksum unpack
 	# Figure out the builddir
 	for i in src/*; do
 		if [ -d "$i" ]; then
@@ -339,7 +339,6 @@ __EOF__
 }
 
 __EOF__
-	abuild -f checksum
 }
 
 usage() {