gen_compile_commands: fix invalid escape sequence warning

[ Upstream commit dae4a0171e25884787da32823b3081b4c2acebb2 ]

With python 3.12, '\#' results in this warning
    SyntaxWarning: invalid escape sequence '\#'

Signed-off-by: Andrew Ballance <andrewjballance@gmail.com>
Reviewed-by: Justin Stitt <justinstitt@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

scripts/clang-tools/gen_compile_commands.py

@@ -184,7 +184,7 @@ def process_line(root_directory, command_prefix, file_path):
     # escape the pound sign '#', either as '\#' or '$(pound)' (depending on the
     # kernel version). The compile_commands.json file is not interepreted
     # by Make, so this code replaces the escaped version with '#'.
-    prefix = command_prefix.replace('\#', '#').replace('$(pound)', '#')
+    prefix = command_prefix.replace(r'\#', '#').replace('$(pound)', '#')
 
     # Use os.path.abspath() to normalize the path resolving '.' and '..' .
     abs_path = os.path.abspath(os.path.join(root_directory, file_path))