Roll icu (122379 -> 122609)

This is to make clang happy. See http://codereview.chromium.org/9420032/
for the actual changes.

See also http://codereview.chromium.org/9355015/ (to suppress an unknown pragam warning in VS)

BUG=84851, 92756
TEST=Builds on all platforms go fine and clang does not complain about decNumber.c and colldata.cpp in ICU.
TBR=thakis
Review URL: https://chromiumcodereview.appspot.com/9418029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@122611 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/DEPS b/DEPS
index a7881ab..ec4d94b 100644
--- a/DEPS
+++ b/DEPS
@@ -87,7 +87,7 @@
     "/trunk/deps/third_party/WebKit@76115",
 
   "src/third_party/icu":
-    "/trunk/deps/third_party/icu46@122379",
+    "/trunk/deps/third_party/icu46@122609",
 
   "src/third_party/hunspell":
    "/trunk/deps/third_party/hunspell@110423",