Update to upstream 2.6 tarball

- Update to upstream 2.6 tarball
- Update to changing SONAME (libabigail.so.5.0.0)
- Add BuildRequires xxhash-devel
- Resolves https://issues.redhat.com/browse/RHEL-64063

Signed-off-by: Dodji Seketeli <dodji@seketeli.net>

libabigail.spec

@@ -2,7 +2,7 @@
 %global tarball_name %{name}-%{version}
 
 Name: libabigail
-Version: 2.5
+Version: 2.6
 Release: 1%{?dist}
 Summary: Set of ABI analysis tools
 
@@ -17,6 +17,7 @@ BuildRequires: gcc-c++
 BuildRequires: libtool
 BuildRequires: elfutils-devel
 BuildRequires: libxml2-devel
+BuildRequires: xxhash-devel
 BuildRequires: doxygen
 BuildRequires: python3-devel
 BuildRequires: python3-sphinx
@@ -137,8 +138,8 @@ fi
 %{_bindir}/abilint
 %{_bindir}/abipkgdiff
 %{_bindir}/kmidiff
-%{_libdir}/libabigail.so.4
-%{_libdir}/libabigail.so.4.0.0
+%{_libdir}/libabigail.so.5
+%{_libdir}/libabigail.so.5.0.0
 %{_libdir}/libabigail/default.abignore
 %doc README AUTHORS ChangeLog
 %license LICENSE.txt license-change-2020.txt
@@ -162,6 +163,11 @@ fi
 %endif
 
 %changelog
+* Fri Dec 13 2024 Dodji Seketeli <dodji@redhat.com> - 2.6-1
+- Update to upstream 2.6 tarball
+- Update to changing SONAME (libabigail.so.5.0.0)
+- Add BuildRequires xxhash-devel
+
 * Tue Apr 23 2024 Dodji Seketeli <dodji@redhat.com> - 2.5-1
 - Update to upstream 2.5 tarball
 - Drop patches (as they are now upstream):