Add a new command to summarize memory usage by function addresses in dmprof

Add a new command to summarize memory usage by function addresses in dmprof

The output format is:
vss1;rss1;addr1;symbol1
vss2;rss2;addr2;symbol2
...
The symbol is related to the addr. If the binary file has symbols, it just same as before:function@sourcefile.
Otherwise it will show the pathname the addr belongs to (mainly it's the library).
This new command could be helpful for lcation leaks.

R=kouhei@chromium.org
BUG=427393
Committed: https://crrev.com/09714684ace60105a81c539516b945fe4d0b3d65
Cr-Commit-Position: refs/heads/master@{#302745}

[kouhei (in TOK), 2014-11-04 17:50:18]

kouhei@chromium.org changed reviewers:
+ dmikurube@chromium.org

[kouhei (in TOK), 2014-11-04 17:50:42]

lgtm

[wensheng, 2014-11-05 01:26:38]

The CQ bit was checked by wensheng.he@samsung.com

[commit-bot: I haz the power, 2014-11-05 01:27:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/700773002/1

[commit-bot: I haz the power, 2014-11-05 02:14:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-05 02:15:08]

Patchset 1 (id:??) landed as
https://crrev.com/09714684ace60105a81c539516b945fe4d0b3d65
Cr-Commit-Position: refs/heads/master@{#302745}