Test runtime/NMT/JcmdDiffCallsite.java simultaneously fails with "'(malloc=0' missing from stdout/stderr" due to missing info about NMTMalloc call site in jcmd output.

Here is analysis provided by Zhengyu Gu
> It appears that the test case is not valid. Compiler inline decision causes NMT to under walk or over walk the stack.
> In Linux 64 case, it over walked, collided with other call site, so free did not cause the call site memory to drop to 0.