Patch for bug #6270
This patch is for the future when samba4 builds using external libraries. With
this patch, tevent now installs tevent_util.h which is required by samba4.
(cherry picked from commit
b112cc5503350b248949bdbcce8072f5523ce877)
installheaders:: installdirs
cp $(srcdir)/tevent.h $(DESTDIR)$(includedir)
cp $(srcdir)/tevent_internal.h $(DESTDIR)$(includedir)
+ cp $(srcdir)/tevent_util.h $(DESTDIR)$(includedir)
installlibs:: installdirs
cp tevent.pc $(DESTDIR)$(libdir)/pkgconfig