nxgdb: fix remote-register regular expression match

The code clearly expects the output of the 'maint print
remote-registers' to be indented by white-space character but at least
in my case it is not. This changes the match to consume any number of
white-space characters before it encounteres the register name.

Signed-off-by: Karel Kočí <cynerd@email.cz>

tools/pynuttx/nxgdb/thread.py

@@ -65,7 +65,7 @@ class Registers:
 
                 # Name         Nr  Rel Offset    Size  Type            Rmt Nr  g/G Offset
                 match = re.match(
-                    r"\s(\S+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\S+)(?:\s+(\d+)\s+(\d+))?",
+                    r"\s*(\S+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\S+)(?:\s+(\d+)\s+(\d+))?",
                     line,
                 )
                 if not match: