SECURITY UPDATE: stack buffer overflow in the genrb resource-bundle
compiler
debian/patches/CVE-2025-5222.patch: replace the fixed-size 1024-byte
subtag/typeKeyword stack buffers in addCollation(),
parseCollationElements() and realParseTable() with CharString in
source/tools/genrb/parse.cpp, and add the CharString UChar* overload
it needs to source/common/charstr.{cpp,h}.