rtl: add FPC Independent Unicode String Manager from Inoussa (mantis #0022909)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23730 3ad0048d-3df7-0310-abae-a5850022a9f2
rtl: enabled collations building for win32 target

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23731 3ad0048d-3df7-0310-abae-a5850022a9f2