t/351-deps-forget: forgot skip-if-minimal-do.

minimal/do doesn't really understand dependencies at all, to say
nothing of forgetting targets and converting them to sources.

t/351-deps-forget/all.do

@@ -30,6 +30,8 @@ is_ood() {
 	redo-ood | qgrep '^bork$'
 }
 
+. ../skip-if-minimal-do.sh
+
 
 # The table for our table-driven test.
 # Column meanings are:

t/skip-if-minimal-do.sh

@@ -2,4 +2,3 @@ if [ -n "$DO_BUILT" ]; then
 	echo "$REDO_TARGET: skipping: not supported in minimal/do." >&2
 	exit 0
 fi
-