refs #6566 ignore some compiler warnings from third party stuff

CTestCustom.cmake

@@ -231,8 +231,11 @@ list(APPEND CTEST_CUSTOM_WARNING_EXCEPTION
   # don't complain about clang missing warnings from xz code
   "clang: warning: unknown warning option"
   # don't complain about warnings in jemalloc source
-  "jemalloc-3.3.0/src"
+  "jemalloc/src"
   "jemalloc/internal"
+  # don't complain about valgrind headers leaving things unused
+  "valgrind/valgrind.h"
+  "valgrind/memcheck.h"
   # don't complain about ranlib or libtool on empty archive
   "has no symbols"
   "the table of contents is empty"