cmake: flash: update cmake to support rtt target

Add support for the rtt target so that users can run

`west build -p auto -b <board> -t rtt <app>`

similarly to the way that users can now do so with the debug
target, since the rtt target is supposed to be used in a similar
way.

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>

cmake/flash/CMakeLists.txt

@@ -154,7 +154,7 @@ endif()
 
 # Generate the flash, debug, debugserver, attach targets within the build
 # system itself.
-foreach(target flash debug debugserver attach)
+foreach(target flash debug debugserver attach rtt)
   if(target STREQUAL flash)
     set(comment "Flashing ${BOARD}")
   elseif(target STREQUAL debug)
@@ -168,6 +168,8 @@ foreach(target flash debug debugserver attach)
     endif()
   elseif(target STREQUAL attach)
     set(comment "Debugging ${BOARD}")
+  elseif(target STREQUAL rtt)
+    set(comment "RTT ${BOARD}")
   endif()
   string(TOUPPER ${target} TARGET_UPPER)
 

scripts/west_commands/debug.py

@@ -85,7 +85,7 @@ class Rtt(WestCommand):
             'open an rtt shell',
             "",
             accepts_unknown_args=True)
-        self.runner_key = 'rtt-runner'  # in runners.yaml
+        self.runner_key = 'debug-runner'  # in runners.yaml
 
     def do_add_parser(self, parser_adder):
         return add_parser_common(self, parser_adder)