Add two new tests, sed-recurses-properly should always work

testsuite/sed/sed-branch

@@ -0,0 +1,15 @@
+busybox sed 's/a/1/;t one;p;: one;p'>output <<EOF
+a
+b
+c
+EOF
+cmp -s output - <<EOF
+1
+1
+b
+b
+b
+c
+c
+c
+EOF

testsuite/sed/sed-chains-substs2

@@ -0,0 +1 @@
+test x"$(echo foo | busybox -n sed -e s/foo/bar/ -e s/foo/baz/)" = x

testsuite/sed/sed-recurses-properly

@@ -1,2 +1 @@
-# XFAIL
 test "`echo '12345' | busybox sed -e 's/[[:space:]]*/,/g')` = ',1,2,3,4,5,'"