Update to upstream fixes up to libabigail-1.8.1

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

libabigail.spec

@@ -1,14 +1,21 @@
-%global tarball_revision 0
+%global tarball_revision 1
 %global tarball_name %{name}-%{version}
 
 Name: libabigail
-Version: 1.8
-Release: 2%{?dist}
+Version: 1.8.1
+Release: 1%{?dist}
 Summary: Set of ABI analysis tools
 
 License: LGPLv3+
 URL: https://sourceware.org/libabigail/
 Source0: http://mirrors.kernel.org/sourceware/libabigail/%{tarball_name}.tar.gz
+# The tarball is built from the content of the git repository by doing:
+# git clone git://sourceware.org/git/libabigail.git --branch libabigail-1.8
+# cd libabigail
+# git checkout lbiabigail-1.8.1
+# autoreconf -i
+# configure
+# make dist
 
 BuildRequires: gcc-c++
 BuildRequires: libtool
@@ -157,6 +164,26 @@ fi
 %endif
 
 %changelog
+* Wed Jan 27 2021 Dodji Seketeli <dodji@seketeli.org> - 1.8.1-1
+- Update to upstream fixes up to libabigail-1.8.1
+  This encompasses this fixes, compared to the last 1.8 release:
+      ir: Add better comments to types_have_similar_structure
+      mainpage: Update web page for 1.8 release
+      Bug 26992 - Try harder to resolve declaration-only classes
+      Bug 27204 -  potential loss of some aliased ELF function symbols
+      Ignore duplicated functions and those not associated with ELF symbols
+      Bug 27236 - Pointer comparison wrongly fails because of typedef change
+      Bug 27233 - fedabipkgdiff fails on package gnupg2 from Fedora 33
+      Bug 27232 - fedabipkgdiff fails on gawk from Fedora 33
+      dwarf-reader: Support fast DW_FORM_line_strp string comparison
+      gen-changelog.py: Update call to subprocess.Popen & cleanup
+      Bug 27255 - fedabipkgdiff fails on nfs-utils on Fedora 33
+      abidiff: support --dump-diff-tree with --leaf-changes-only
+      ir: Arrays are indirect types for type structure similarity purposes
+      Add qualifier / typedef / array / pointer test
+      abg-ir: Optimize calls to std::string::find() for a single char.
+      abipkgdiff: Address operator precedence warning
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.8-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild