move lib caches to session

fca3be3
Opened by Graydon Hoare at 2011-01-27 00:45:20

The asm-reader, section-table, metadata and die caches in the front-end library-reading module are static (per rustboot). Move them to the session structure.

  1. WONTFIX (not required for bootstrapping)

    Graydon Hoare at 2011-01-27 00:45:20