Clean up ICU headers

Clean up ICU headers
https://bugs.webkit.org/show_bug.cgi?id=170997

Patch by Andy VanWagoner <thetalecrafter@gmail.com> on 2017-04-24
Reviewed by JF Bastien.

Update all icu headers to 55.1

Source/JavaScriptCore:

* icu/LICENSE: Update copyright
* icu/README: Explain ICU headers for OS X better
* icu/unicode/localpointer.h:
(LocalPointer::LocalPointer):
(LocalPointer::adoptInsteadAndCheckErrorCode):
* icu/unicode/platform.h:
* icu/unicode/putil.h:
* icu/unicode/ucal.h:
* icu/unicode/uchar.h:
* icu/unicode/ucnv.h:
* icu/unicode/ucol.h:
* icu/unicode/uconfig.h:
* icu/unicode/ucurr.h:
* icu/unicode/udatpg.h:
* icu/unicode/udisplaycontext.h:
* icu/unicode/uformattable.h:
* icu/unicode/uloc.h:
* icu/unicode/umachine.h:
* icu/unicode/unum.h:
* icu/unicode/unumsys.h:
* icu/unicode/urename.h:
* icu/unicode/uscript.h:
* icu/unicode/uset.h:
* icu/unicode/ustring.h:
* icu/unicode/utf8.h:
* icu/unicode/utypes.h:

Source/WebCore:

* icu/LICENSE: Update copyright
* icu/README: Explain ICU headers for OS X better
* icu/unicode/localpointer.h:
(LocalPointer::LocalPointer):
(LocalPointer::adoptInsteadAndCheckErrorCode):
* icu/unicode/platform.h:
* icu/unicode/putil.h:
* icu/unicode/std_string.h:
* icu/unicode/ubrk.h:
* icu/unicode/uchar.h:
* icu/unicode/ucnv.h:
* icu/unicode/ucol.h:
* icu/unicode/ucoleitr.h:
* icu/unicode/uconfig.h:
* icu/unicode/ucurr.h:
* icu/unicode/uidna.h:
* icu/unicode/uloc.h:
* icu/unicode/umachine.h:
* icu/unicode/unistr.h:
(UnicodeString::getArrayStart):
(UnicodeString::UnicodeString):
(UnicodeString::hasShortLength):
(UnicodeString::getShortLength):
(UnicodeString::length):
(UnicodeString::getCapacity):
(UnicodeString::isBogus):
(UnicodeString::isWritable):
(UnicodeString::isBufferWritable):
(UnicodeString::getBuffer):
(UnicodeString::isEmpty):
(UnicodeString::setZeroLength):
(UnicodeString::setShortLength):
(UnicodeString::setLength):
(UnicodeString::setToEmpty):
(UnicodeString::remove):
* icu/unicode/urename.h:
* icu/unicode/uscript.h:
* icu/unicode/usearch.h:
* icu/unicode/uset.h:
* icu/unicode/ustring.h:
* icu/unicode/utf8.h:
* icu/unicode/utypes.h:
* icu/unicode/uvernum.h:

Source/WebKit/mac:

* icu/README: Explain ICU headers for OS X better
* icu/unicode/localpointer.h:
(LocalPointer::LocalPointer):
(LocalPointer::adoptInsteadAndCheckErrorCode):
* icu/unicode/platform.h:
* icu/unicode/putil.h:
* icu/unicode/uchar.h:
* icu/unicode/uconfig.h:
* icu/unicode/ucurr.h:
* icu/unicode/uidna.h:
* icu/unicode/umachine.h:
* icu/unicode/urename.h:
* icu/unicode/uscript.h:
* icu/unicode/ustring.h:
* icu/unicode/utf8.h:
* icu/unicode/utypes.h:
* icu/unicode/uvernum.h:

Source/WTF:

* icu/LICENSE: Update copyright
* icu/README: Explain ICU headers for OS X better
* icu/unicode/localpointer.h:
(LocalPointer::LocalPointer):
(LocalPointer::adoptInsteadAndCheckErrorCode):
* icu/unicode/platform.h:
* icu/unicode/putil.h:
* icu/unicode/std_string.h:
* icu/unicode/ubrk.h:
* icu/unicode/uchar.h:
* icu/unicode/ucnv.h:
* icu/unicode/ucol.h:
* icu/unicode/uconfig.h:
* icu/unicode/ucurr.h:
* icu/unicode/uloc.h:
* icu/unicode/umachine.h:
* icu/unicode/unistr.h:
(UnicodeString::getArrayStart):
(UnicodeString::UnicodeString):
(UnicodeString::hasShortLength):
(UnicodeString::getShortLength):
(UnicodeString::length):
(UnicodeString::getCapacity):
(UnicodeString::isBogus):
(UnicodeString::isWritable):
(UnicodeString::isBufferWritable):
(UnicodeString::getBuffer):
(UnicodeString::isEmpty):
(UnicodeString::setZeroLength):
(UnicodeString::setShortLength):
(UnicodeString::setLength):
(UnicodeString::setToEmpty):
(UnicodeString::remove):
* icu/unicode/urename.h:
* icu/unicode/uscript.h:
* icu/unicode/uset.h:
* icu/unicode/ustring.h:
* icu/unicode/utf8.h:
* icu/unicode/utypes.h:
* icu/unicode/uvernum.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@215722 268f45cc-cd09-0410-ab3c-d52691b4dbfc