Update all m4 macros to prevent mismatch between Automake versions

+ automake --add-missing
configure.ac:20: error: version mismatch.  This is Automake 1.15.1,
configure.ac:20: but the definition used by this AM_INIT_AUTOMAKE
configure.ac:20: comes from Automake 1.15.  You should recreate
configure.ac:20: aclocal.m4 with aclocal and run automake again.

realmd.spec

@@ -1,6 +1,6 @@
 Name:		realmd
 Version:	0.16.3
-Release:	7%{?dist}
+Release:	8%{?dist}
 Summary:	Kerberos realm enrollment service
 License:	LGPLv2+
 URL:		http://cgit.freedesktop.org/realmd/realmd/
@@ -48,8 +48,7 @@ applications that use %{name}.
 %patch4 -p1
 
 %build
-automake --add-missing
-autoconf
+autoreconf -fi
 %configure --disable-silent-rules
 make %{?_smp_mflags}
 
@@ -81,6 +80,9 @@ make install DESTDIR=%{buildroot}
 %doc ChangeLog
 
 %changelog
+* Tue Sep 05 2017 Petr Pisar <ppisar@redhat.com> - 0.16.3-8
+- Update all m4 macros to prevent from mismatching between Automake versions
+
 * Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 0.16.3-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild