Update the ICU data

Update the ICU data

Fix the following errors found by jochen@ in
  https://codereview.chromium.org/960263002/

1. brkitr: en_US_POSIX is not supported. Remove it from brklocal.mk
   : We don't use en_US_POSIX and the remaining dependency on it in
   some unittests was already removed. (we may need it back later,
   though, for breaking an FQDN into components.)
2. coll: Explicitly add id.txt required as the alias/parent of "in" and
   "id_ID". This should not affect the collation in Indonesian locale
   because falling back to the root locale should be fine.
3. lang: Add 'ro_MD.txt' required as the alias of 'mo.txt'.

Also update make_mac_asseymbly.sh to get it to read off the ICU major
version automatically.

Besides, update README.chromium to refer to ICU 54 as done by the
aforementioned CL.

Rebuild the data files and assembly sources (the latter still required
by stand-alone v8 builds) for all the platforms.

icudtl.dll for Windows will be built and checked in in  another CL.

BUG=428145
TEST=Usual ICU update tests before rolling DEPS. See https://codereview.chromium.org/878723002
TBR=jochen@chromium.org

Committed: https://chromium.googlesource.com/chromium/deps/icu/+/db16fd86566ffdecce9d4b8e61e21d5316626537

[jungshik at Google, 2015-03-02 07:51:59]

Jochen, I believe that I've fixed the issue you came across in
https://codereview.chromium.org/960263002/

If you wish to,  please feel free to build the windows data dll after updating
your tree. 

If not, I'll just rebuild and land it once I get back to work on Monday morning.
 

I'd have built icudtl.dat for Windows, but my Windows machine is off the network
 (I forgot to put the Windows machine back online after using a cros test
machine the other day.)

[jungshik at Google, 2015-03-02 08:02:50]

Committed patchset #1 (id:1) manually as
db16fd86566ffdecce9d4b8e61e21d5316626537 (presubmit successful).