compile exe in test with core bindings to avoid recompilation of Hello

testsuite/tests/bytecode/T24634/Makefile

@@ -5,5 +5,5 @@ include $(TOP)/mk/test.mk
 T24634:
 	$(TEST_HC) -c -dynamic hello_c.c -o hello_c.o
 	$(TEST_HC) -c -fbyte-code-and-object-code Hello.hs
-	$(TEST_HC) -fprefer-byte-code hello_c.o Main.hs
+	$(TEST_HC) -fbyte-code-and-object-code -fprefer-byte-code hello_c.o Main.hs
 	./Main

testsuite/tests/bytecode/T24634/T24634.stdout

-[2 of 3] Compiling Main             ( Main.hs, Main.o )
+[2 of 3] Compiling Main             ( Main.hs, Main.o, interpreted )
 [3 of 3] Linking Main
 42

testsuite/tests/bytecode/T24634/all.T

@@ -2,7 +2,6 @@ test('T24634',
      [extra_files(['hello_c.h', 'hello_c.c', 'Hello.hs', 'Main.hs']),
       req_c,
       req_th,
-      ignore_stderr
       ],
      makefile_test,
      [])