Modernize spec file a bit

Signed-off-by: Jan Friesse <jfriesse@redhat.com>

omping.spec

@@ -1,12 +1,14 @@
 Name: omping
 Version: 0.0.4
-Release: 14%{?dist}
+Release: 15%{?dist}
 Summary: Utility to test IP multicast functionality
 Group: Applications/Internet
 License: ISC
 URL: http://fedorahosted.org/omping/
 Source0: http://fedorahosted.org/releases/o/m/omping/%{name}-%{version}.tar.gz
 
+BuildRequires: gcc
+
 %description
 Omping (Open Multicast Ping) is tool to test IP multicast functionality
 primarily in local network.
@@ -18,16 +20,19 @@ primarily in local network.
 make %{?_smp_mflags} CFLAGS="%{optflags}" LDFLAGS="$RPM_LD_FLAGS"
 
 %install
-rm -rf %{buildroot}
 make DESTDIR="%{buildroot}" PREFIX="%{_prefix}" install
 
 %files
-%defattr(-,root,root,-)
 %doc AUTHORS COPYING
 %{_bindir}/%{name}
 %{_mandir}/man8/*
 
 %changelog
+* Tue Jul 10 2018 Jan Friesse <jfriesse@redhat.com> - 0.0.4-15
+- Modernize spec file a bit
+- Fix spec file changelog dates
+- Add gcc build requirement
+
 * Mon Jul  9 2018 Florian Weimer <fweimer@redhat.com> - 0.0.4-14
 - Use LDFLAGS from redhat-rpm-config
 
@@ -67,13 +72,13 @@ make DESTDIR="%{buildroot}" PREFIX="%{_prefix}" install
 * Fri Jan 13 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.0.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass_Rebuild
 
-* Mon Jun 22 2011 Jan Friesse <jfriesse@redhat.com> - 0.0.4-1
+* Wed Jun 22 2011 Jan Friesse <jfriesse@redhat.com> - 0.0.4-1
 - Update to version 0.0.4
 
 * Mon May 02 2011 Jan Friesse <jfriesse@redhat.com> - 0.0.3-1
 - Update to version 0.0.3
 
-* Wed Apr 14 2011 Jan Friesse <jfriesse@redhat.com> - 0.0.2-3
+* Thu Apr 14 2011 Jan Friesse <jfriesse@redhat.com> - 0.0.2-3
 - Resolves rhbz#696509
 
 * Tue Feb 08 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.0.2-2