java/eclipse: 4.4.2 -> 4.5.1

- Bump to Eclipse 4.5.1
- Switch to using Maven 3.3
- add fix for running Eclipse build for Gtk2 only on a system where
  Gtk3 might also be installed.
- Details:
  https://projects.eclipse.org/releases/mars/details
- Bugs fixed:
  https://bugs.eclipse.org/bugs/buglist.cgi?classification=Eclipse&classification=RT&product=Equinox&product=JDT&product=PDE&product=Platform&query_format=advanced&resolution=FIXED&target_milestone=4.5.1

PR:		203689
Submitted by:	Jimmy Kelley <ljboiler@gmail.com> (maintainer)

java/eclipse/scripts/pre-patch

@@ -18,8 +18,7 @@ for d in \
 	${WRKSRC}/eclipse.platform.team/bundles/org.eclipse.core.net/natives/unix/linux \
 	${WRKSRC}/rt.equinox.binaries/org.eclipse.equinox.launcher.gtk.linux.x* \
 	${WRKSRC}/rt.equinox.binaries/org.eclipse.equinox.executable/bin/gtk/linux/x* \
-	${WRKSRC}/rt.equinox.framework/bundles/org.eclipse.equinox.launcher.gtk.linux.x* \
-	${WRKSRC}/rt.equinox.framework/features/org.eclipse.equinox.executable.feature/bin/gtk/linux/x*
+	${WRKSRC}/rt.equinox.framework/bundles/org.eclipse.equinox.launcher.gtk.linux.x*
 do
   mkdir -p `echo $d | sed -e 's/linux/freebsd/'`
   [ -d $d ] && ( cd $d; tar cf - . ) | ( cd `echo $d | sed -e 's/linux/freebsd/'`; tar xf - )