dc.tests: fix two test case to also depend on DC_BIG

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

testsuite/dc.tests

@@ -41,6 +41,9 @@ testing "dc complex without spaces (multiple args)" \
 	"16\n" \
 	"" ""
 
+optional FEATURE_DC_BIG
+# All tests below depend on FEATURE_DC_BIG
+
 testing "dc read" \
 	"dc -finput" \
 	"2\n9\n1\n" \
@@ -51,9 +54,6 @@ testing "dc read string" \
 	"2\nstr\n1\n" \
 	"1?2\nf" "[str]\n"
 
-optional FEATURE_DC_BIG
-# All tests below depend on FEATURE_DC_BIG
-
 testing "dc '>a' (conditional execute string) 1" \
 	"dc" \
 	"1\n9\n" \