Fix caching when parsing LD script

Author: ivankravets

builder/main.py

@@ -14,6 +14,7 @@
 
 # pylint: disable=redefined-outer-name
 
+import functools
 import re
 import sys
 from os.path import join
@@ -46,6 +47,7 @@ def _parse_size(value):
     return value
 
 
+@functools.lru_cache(maxsize=None)
 def _parse_ld_sizes(ldscript_path):
     assert ldscript_path
     result = {}