Fix another test failure

We need the test scripts to become +x *after* they are created.

src/test/include.am

@@ -17,7 +17,7 @@ TESTS += src/test/test src/test/test-slow src/test/test-memwipe \
 check-am: set-test-permissions
 
 .PHONY: set-test-permissions
-set-test-permissions:
+set-test-permissions: $(TESTSCRIPTS)
 	chmod u+x $(TESTSCRIPTS)