Update icu x86_64 package with namespace renaming enabled.

"Renaming" means the icu namespace is suffixed with the version number,
atm icu_55. Using "renaming" allows to use two different versions of ICU,
thus easing upgrades. For instance haikuwebkit uses a current version of ICU,
while the system uses a newer one after an upgrade.

* Replace all uses of the icu namespace in our public headers, with a macro
defaulting to icu. As the namespace is only used for private fields pointers,
there should be no impact.
* Locale kit *.cpp have to import the macro from <unicode/uversion.h> *before*
including any locale headers. Ditto for a Time preferences cpp file. This way,
the correct current icu namespace is referenced.
* Fixes bug #12057.

build/jam/repositories/HaikuPorts/x86_64

@@ -97,8 +97,8 @@ RemotePackageRepository HaikuPorts
 	harfbuzz_devel-0.9.39-1
 	help2man-1.44.1-1
 	htmldoc-1.8.27-3
-	icu-55.1-2
-	icu_devel-55.1-2
+	icu-55.1-3
+	icu_devel-55.1-3
 	icu54-54.1-1
 	icu54_devel-54.1-1
 	intltool-0.40.6-4