FreeBSD_HEAD_i386 - Build #3463 - Fixed

[jenkins-admin at FreeBSD.org]

FreeBSD_HEAD_i386 - Build #3463 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/3463/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/3463/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD_i386/3463/console

Change summaries:

302242 by kib:
Fix userspace build after r302235: do not expose bool field of the
structure, change it to int.

The real fix is to sanitize user-visible definitions in sys/event.h,
e.g. the affected struct knlist is of no use for userspace programs.

Reported and tested by:	jkim
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Approved by:	re (gjb)