bash: upgraded package to upstream

Upgraded app-shells/bash to version 4.2_p48-r1 for all.

Also apply Redhat patches:
	bash-4.2-redhat-func-export.patch
	bash-4.2-redhat-here-docs-stack.patch

BUG=chromium:417329
TEST=`env X='() { (a)=>\' bash -c "/dev/stdin date"` no longer shows the date
TEST=`cbuildbot amd64-generic-full` passes

Change-Id: Idc1be24910a9b991156f290d1dcefc64202385cd
Previous-Reviewed-on: https://chromium-review.googlesource.com/220190
(cherry picked from commit 55046f236d8f112b009414a04bec36f3bfb6759d)
Reviewed-on: https://chromium-review.googlesource.com/220353
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
11 files changed