nichamon

@tom95858 @morrone I could build and load store_csv without problems. `store_csv` links to ldmsd_plugattr and calls its APIs. FYI, the build flags I used were `-ggdb3 -O0 -Werror -Wall`.

@morrone Ah ... I see. I was unaware that a stand-alone program uses the ldmsd_plugattr library. I created PR #1250 to fix the build problem.

@tom95858 No, the current code does not work as @morrone's suggestion yet. We discussed and planned to add the restriction that all list entries must be of the same value...

@baallan I'll wait for your result then.

I'll look into this.