gdb, gdbserver, gdbsupport: fix whitespace issues

Replace spaces with tabs in a bunch of places.

Change-Id: If0f87180f1d13028dc178e5a8af7882a067868b0

gdb/linux-thread-db.c

@@ -809,8 +809,8 @@ static bool
 libpthread_objfile_p (objfile *obj)
 {
   return (libpthread_name_p (objfile_name (obj))
-          && lookup_minimal_symbol ("pthread_create",
-	                            NULL,
+	  && lookup_minimal_symbol ("pthread_create",
+				    NULL,
 				    obj).minsym != NULL);
 }