git: openjdk/panama-foreign: foreign-jextract: Update memory access and linker documents

[Maurizio Cimadamore]

Changeset: eb2f956a
Author:    Maurizio Cimadamore <mcimadamore at openjdk.org>
Date:      2021-03-26 21:24:10 +0000
URL:       https://git.openjdk.java.net/panama-foreign/commit/eb2f956a

Update memory access and linker documents

Reviewed-by: jvernee

! README.md
! doc/panama_ffi.html
! doc/panama_ffi.md
! doc/panama_memaccess.html
! doc/panama_memaccess.md