#4707 turn off valgrind for test-xa-prepare refs[t:4707]

git-svn-id: file:///svn/toku/tokudb@41714 c7de825b-a66e-492c-adef-691d508d4ae1

src/tests/Makefile

@@ -726,6 +726,7 @@ stress-test.tdbrun: VGRIND=
 stress-test.bdbrun: VGRIND=
 hot-optimize-table-tests.tdbrun: VGRIND=
 test4573-logtrim.tdbrun: VGRIND=
+test-xa-prepare.tdbrun: VGRIND=
 
 libs:
 	cd ..;$(MAKE)