build: add library_files to gyp variables

GYP uses the system path when parsing node.gyp;
However, if system python is different from our
gyp runtime python, like '2.7', gyp would crash.

Co-authored-by: Michaël Zasso <targos@protonmail.com>

configure.py

@@ -45,6 +45,7 @@
 import getnapibuildversion
 import getsharedopensslhasquic
 from gyp_node import run_gyp
+from utils import SearchFiles
 
 # parse our options
 parser = argparse.ArgumentParser()
@@ -1148,6 +1149,8 @@ def gcc_version_ge(version_checked):
       return False
   return True
 
+def configure_node_lib_files(o):
+  o['variables']['node_library_files'] = SearchFiles('lib', 'js')
 
 def configure_node(o):
   if options.dest_os == 'android':
@@ -1896,6 +1899,7 @@ def make_bin_override():
 flavor = GetFlavor(flavor_params)
 
 configure_node(output)
+configure_node_lib_files(output)
 configure_napi(output)
 configure_library('zlib', output)
 configure_library('http_parser', output)

node.gyp

@@ -33,7 +33,7 @@
     # Windows command length limit or there would be an error.
     # See https://docs.microsoft.com/en-us/troubleshoot/windows-client/shell-experience/command-line-string-limitation
     'library_files': [
-      '<!@(python tools/search_files.py --ext js lib)',
+      '<@(node_library_files)',
     ],
     'deps_files': [
       'deps/v8/tools/splaytree.mjs',