Add support for building rtems-or1k tool-chain - fixed

Configuration files get the following releases:
- binutils-2.24
- newlib-2.1.0
- gcc-4.8.2
- gdb-7.7

Patches to tool-chain are mix of OpenRISC original patches and other
additions to build the previous releases for RTEMS.

source-builder/config/gdb-7-1.cfg

@@ -4,6 +4,10 @@
 # This configuration file configure's, make's and install's gdb.
 #
 
+%if %{gdb-disable-sim} == %{nil}
+%define gdb-disable-sim 0
+%endif
+
 %include %{_configdir}/checks.cfg
 
 #
@@ -73,7 +77,7 @@ BuildRoot: %{_tmppath}/%{name}-root-%(%{__id_u} -n)
     --without-included-gettext \
     --disable-win32-registry \
     --disable-werror \
-    --enable-sim \
+    %{!?gdb-disable-sim:--enable-sim}%{?gdb-disable-sim:--disable-sim} \
     --without-zlib \
     --with-expat \
     %{!?without_python:--with-python} \