Rerun convert_dict on en-US and en-CA

Rerun convert_dict on en-US and en-CA

Dictionaries en-US-6-0.bdic and en-CA-6-0.bdic are missing REP rules.
For example, "a lot" would not be suggested for "alot". This patch adds
en-US-6-1.bdic and en-US-6-1.bdic, which have the REP rules after
rerunning convert_dict. The Chrome side of rolling the dictionaries will
include a test for "alot" -> "a lot" suggestion.

BUG=165079
R=groby@chromium.org
TBR=darin@chromium.org

Committed: 377b158a8996e3a31961f14c2b7699cff91d615d

Committed: 294404

[please use gerrit instead, 2015-03-10 22:07:19]

rouslan@chromium.org changed reviewers:
+ groby@chromium.org

[please use gerrit instead, 2015-03-10 22:10:29]

Rachel, PTAL.

It appears that I used an old version of convert_dict that stripped REP rules
when I was generating 6-0 files.

I've TBR-ed darin@chromium.org per instructions in:
https://chromium.googlesource.com/chromium/src/+/master/third_party/OWNERS

[groby-ooo-7-16, 2015-03-10 23:34:30]

lgtm

[please use gerrit instead, 2015-03-11 16:00:52]

Committed patchset #1 (id:1) manually as
377b158a8996e3a31961f14c2b7699cff91d615d (presubmit successful).

[please use gerrit instead, 2015-03-11 16:17:19]

Committed patchset #2 (id:20001) manually as 294404 (presubmit successful).