Upstream changes (ChangeLog):
* 1.4.6: mark EbmlHead as not-infinite per RFC 8794; fix leak on upper
element found inside the last element; EbmlString::ReadFully and
EbmlUnicodeString use std::string / automatic memory management;
IOCallback avoids reading more than 2^32 at once; fix includes not
implicit in modern compilers; download utfcpp automatically; add a
DEV_MODE CMake option and a build-configuration summary.
* 1.4.7: fix cmake rules for building with utf8cpp 4.x (upstream #344).
libebml now uses utf8cpp (utfcpp) for Unicode string handling rather
than a bundled copy: CMakeLists does find_package(utf8cpp) and otherwise
FetchContent-downloads it. Add DEPENDS = "utfcpp" (OE-core provides
utfcpp 4.1.1) so the system copy is used and the offline build resolves
utf8cpp::utf8cpp.
Drop 0001-allow-build-with-cmake-4.patch: it backported the
cmake_minimum_required(VERSION 3.5) bump that is now in 1.4.7 upstream.
Update the LICENSE.LGPL checksum for an upstream reformatting of the
license file (content still LGPL-2.1-only).
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
