target/tricore: Build 'gdbstub.c' once for system single binary

There is a single qemu-system-tricore binary, but by moving
'gdbstub.c' in the target_common_system_arch[] source set
the resulting object can be linked into a single qemu-sytem
binary.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260219191955.83815-50-philmd@linaro.org>

target/tricore/meson.build

@@ -5,11 +5,15 @@ tricore_ss.add(files(
   'helper.c',
   'op_helper.c',
   'translate.c',
-  'gdbstub.c',
 ))
 tricore_ss.add(zlib)
 
-tricore_system_ss = ss.source_set()
+tricore_user_ss = ss.source_set()
+tricore_user_ss.add(files('gdbstub.c'))
+
+tricore_common_system_ss = ss.source_set()
+tricore_common_system_ss.add(files('gdbstub.c'))
 
 target_arch += {'tricore': tricore_ss}
-target_common_system_arch += {'tricore': tricore_system_ss}
+target_user_arch += {'tricore': tricore_user_ss}
+target_common_system_arch += {'tricore': tricore_common_system_ss}