feat(debugging): move gdbinit generation to CMake

This feature is useful for 3rd-party software to run GDB with predefined
options that described in project_description.json file

allow to pass custom options to "idf.py gdb":

  --gdb-commands: command line arguments for gdb. (without changes)
  -ex: pass command to gdb.
  -x: pass gdbinit file to gdb. Alias for old --gdbinit command

tools/generate_debug_prefix_map.py

@@ -9,6 +9,7 @@
 
 import argparse
 import os
+import shutil
 from typing import List
 
 
@@ -20,12 +21,18 @@ GDB_SUBSTITUTE_PATH_FMT = 'set substitute-path {} {}\n'
 
 
 def write_gdbinit(build_dir: str, folders: List[str]) -> None:
-    gdb_init_filepath = os.path.join(build_dir, 'prefix_map_gdbinit')
+    gdbinit_dir = os.path.join(build_dir, 'gdbinit')
+    gdbinit_filepath = os.path.join(gdbinit_dir, 'prefix_map')
 
-    with open(gdb_init_filepath, 'w') as fw:
+    if not os.path.exists(gdbinit_dir):
+        os.mkdir(gdbinit_dir)
+
+    with open(gdbinit_filepath, 'w') as fw:
         for folder in folders:
             fw.write(f'{GDB_SUBSTITUTE_PATH_FMT.format(component_name(folder), folder)}')
 
+    shutil.copy(gdbinit_filepath, os.path.join(build_dir, 'prefix_map_gdbinit'))
+
 
 def main(build_dir: str, folders: List[str]) -> None:
     write_gdbinit(build_dir, folders)
@@ -34,7 +41,7 @@ def main(build_dir: str, folders: List[str]) -> None:
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description='print the debug-prefix-map and write to '
-                                                 '$BUILD_DIR/prefix_map_gdbinit file')
+                                                 '$BUILD_DIR/gdbinit/prefix_map file')
 
     parser.add_argument('build_dir',
                         help='build dir')