package: reworked rubygems to not use custmain and export GEM_HOME while building

ruby/rubygems/rubygems.conf

@@ -2,6 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../rubygems/rubygems.conf
+# Copyright (C) 2009 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -11,4 +12,16 @@
 # the Free Software Foundation; version 2 of the License. A copy of the
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
-custmain="ruby setup.rb"
+
+configscript=
+makeopt=
+makeinstopt=
+
+rubygems_install(){
+
+	export GEM_HOME="$root$libdir/ruby/gems/1.8"
+	ruby setup.rb
+
+}
+
+hook_add postmake 5 "rubygems_install"