standards/50848: missing static_assert macro in <assert.h>

[rhansen%rhansen.org@localhost]

>Number:         50848
>Category:       standards
>Synopsis:       missing static_assert macro in <assert.h>
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    standards-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Feb 25 01:25:00 +0000 2016
>Originator:     Richard hansen
>Release:        7.0
>Organization:
>Environment:
NetBSD example.com 7.0 NetBSD 7.0 (GENERIC.201509250726Z) amd64
>Description:
The C11 standard [1] says that assert.h defines the static_assert macro and that it expands to _Static_assert.  This is not the case on NetBSD 7.  (The version of gcc that comes with NetBSD 7 does support _Static_assert.)

[1] http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf
>How-To-Repeat:

>Fix: