check-wrapper-headers test: Adjust Fortran include file directory

The check for "/finclude/" fails with the actual location of
Fortran headers because they are now stored in the "finclude"
subdirectory of the top-level include directory, so a relative path
does not contain a slash '/' before the "finclude" string.

scripts/check-wrapper-headers.py

@@ -76,7 +76,7 @@ def check_headers(args):
         is_nonsysdep_header = os.access(header, os.R_OK)
         if is_nonsysdep_header:
             # Skip Fortran header files.
-            if '/finclude/' in header:
+            if header.startswith("finclude/"):
                 continue
 
             include_path = os.path.join(args.root, INCLUDE, header)