Disable LTO on aarch64 to fix the build (rhbz#2261344)

It turns out that disabling LTO fixes the build on aarch64. With this,
we can also re-enable self tests on aarch64.

libunwind.spec

@@ -35,7 +35,7 @@
 #     Ltest-resume-sig-rt
 #     test-ptrace
 
-%ifarch aarch64 i686 ppc64le s390x
+%ifarch i686 ppc64le s390x
 %global test_failure_override true
 %else
 %global test_failure_override false
@@ -46,7 +46,7 @@
 Summary: An unwinding library
 Name: libunwind
 Version: 1.8.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: MIT
 URL: http://savannah.nongnu.org/projects/libunwind
 Source: https://github.com/libunwind/libunwind/releases/download/v%{version}/%{name}-%{version}.tar.gz
@@ -81,6 +81,11 @@ libunwind.
 %autosetup -p1 -n %{name}-%{version}
 
 %build
+%ifarch aarch64
+# LTO causes FTBFS on aarch64 (rhbz#2261344)
+%global _lto_cflags %{nil}
+%endif
+
 %global optflags %{optflags} -fcommon
 aclocal
 libtoolize --force
@@ -131,6 +136,10 @@ echo ====================TESTING END=====================
 %{_includedir}/libunwind*.h
 
 %changelog
+* Thu Feb 08 2024 Kalev Lember <klember@redhat.com> - 1.8.0-2
+- Disable LTO on aarch64 to fix the build (rhbz#2261344)
+- Re-enable tests on aarch64
+
 * Mon Jan 29 2024 Tom Callaway <spot@fedoraproject.org> - 1.8.0-1
 - update to 1.8.0