expat: Update to version 2.4.4

expat: Update to version 2.4.4

- Update from 2.4.2 to 2.4.4
- Update of rootfile
- Changelog
   Release 2.4.4 Sun January 30 2022
        Security fixes:
            #550  CVE-2022-23852 -- Fix signed integer overflow
                    (undefined behavior) in function XML_GetBuffer
                    (that is also called by function XML_Parse internally)
                    for when XML_CONTEXT_BYTES is defined to >0 (which is both
                    common and default).
                    Impact is denial of service or more.
            #551  CVE-2022-23990 -- Fix unsigned integer overflow in function
                    doProlog triggered by large content in element type
                    declarations when there is an element declaration handler
                    present (from a prior call to XML_SetElementDeclHandler).
                    Impact is denial of service or more.
        Bug fixes:
            #544 #545  xmlwf: Fix a memory leak on output file opening error
        Other changes:
            #546  Autotools: Fix broken CMake support under Cygwin
            #554  Windows: Add missing files to the installer to fix
                    compilation with CMake from installed sources
            #552 #554  Version info bumped from 9:3:8 to 9:4:8;
                    see https://verbump.de/ for what these numbers do
   Release 2.4.3 Sun January 16 2022
        Security fixes:
            #531 #534  CVE-2021-45960 -- Fix issues with left shifts by >=29 places
                    resulting in
                      a) realloc acting as free
                      b) realloc allocating too few bytes
                      c) undefined behavior
                    depending on architecture and precise value
                    for XML documents with >=2^27+1 prefixed attributes
                    on a single XML tag a la
                    "<r xmlns:a='[..]' a:a123='[..]' [..] />"
                    where XML_ParserCreateNS is used to create the parser
                    (which needs argument "-n" when running xmlwf).
                    Impact is denial of service, or more.
            #532 #538  CVE-2021-46143 (ZDI-CAN-16157) -- Fix integer overflow
                    on variable m_groupSize in function doProlog leading
                    to realloc acting as free.
                    Impact is denial of service or more.
            #539  CVE-2022-22822 to CVE-2022-22827 -- Prevent integer overflows
                    near memory allocation at multiple places.  Mitre assigned
                    a dedicated CVE for each involved internal C function:
                    - CVE-2022-22822 for function addBinding
                    - CVE-2022-22823 for function build_model
                    - CVE-2022-22824 for function defineAttribute
                    - CVE-2022-22825 for function lookup
                    - CVE-2022-22826 for function nextScaffoldPart
                    - CVE-2022-22827 for function storeAtts
                    Impact is denial of service or more.
        Other changes:
            #535  CMake: Make call to file(GENERATE [..]) work for CMake <3.19
            #541  Autotools|CMake: MinGW: Make run.sh(.in) work for Cygwin
                    and MSYS2 by not going through Wine on these platforms
            #527 #528  Address compiler warnings
            #533 #543  Version info bumped from 9:2:8 to 9:3:8;
                    see https://verbump.de/ for what these numbers do
        Infrastructure:
            #536  CI: Check for realistic minimum CMake version
            #529 #539  CI: Cover compilation with -m32
            #529  CI: Store coverage reports as artifacts for download
            #528  CI: Upgrade Clang from 11 to 13

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>