Handle vdso samples in hpcprof
Handle vdso samples in hpcprof

The load module names for vdso are vdso/<hash>.vdso
We need to append the measurement directory in front the module name to find the actual vdso file

HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit