[PATCH rtems-tools] rtemstoolkit: add override option for rtems_version

[Gedare Bloom]

Use in tester to allow defining custom rtems_version
to use in tools.

Closes #3671.
---
 rtemstoolkit/options.py  | 1 +
 tester/rtems/version.cfg | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/rtemstoolkit/options.py b/rtemstoolkit/options.py
index 32a7016..e991bc8 100644
--- a/rtemstoolkit/options.py
+++ b/rtemstoolkit/options.py
@@ -80,6 +80,7 @@ class command_line(object):
         self.long_opts = {
             # key                 macro                handler            param  defs       init
             '--jobs'           : ('_jobs',             self._lo_jobs,     True,  'default', True),
+            '--rtems-version'  : ('rtems_version',     self._lo_string,      True, None,       False),
             '--log'            : ('_logfile',          self._lo_string,   True,  None,      False),
             '--macros'         : ('_macros',           self._lo_string,   True,  None,      False),
             '--force'          : ('_force',            self._lo_bool,     False, '0',       True),
diff --git a/tester/rtems/version.cfg b/tester/rtems/version.cfg
index 2cd9073..0ca057e 100644
--- a/tester/rtems/version.cfg
+++ b/tester/rtems/version.cfg
@@ -32,4 +32,6 @@
 # RTEMS Version
 #
 
-%define rtems_version 5
+%if ! %{defined rtems_version}
+  %define rtems_version 5
+%endif
-- 
2.17.1