Build failed in Jenkins: FreeBSD_HEAD-modules #398

See <https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/398/changes>

Changes:

[jilles] include: Remove checks for __BSD_VISIBLE where redundant with __XSI_VISIBLE
or __POSIX_VISIBLE.

Whenever <sys/cdefs.h> sets __BSD_VISIBLE to non-zero, it also sets
__POSIX_VISIBLE and __XSI_VISIBLE to the newest version supported.

No functional change is intended.

[ian] Revert accidental commit of SUBDIR_PARALLEL for sys/modules.  (It hasn't
been tested sufficiently).

------------------------------------------
Started by upstream project "FreeBSD_HEAD" build number 648
originally caused by:
 Started by an SCM change
Building remotely on jenkins-10.freebsd.org (FreeBSD-10) in workspace <https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/>
Updating svn://svn.freebsd.org/base/head/sys at revision '2014-05-11T13:54:37.069 +0000'
U         modules/Makefile
U         sys/stat.h
At revision 265878
Updating svn://svn.freebsd.org/base/head/share/mk at revision '2014-05-11T13:54:37.069 +0000'
At revision 265878
no change for svn://svn.freebsd.org/base/head/share/mk since the previous build
[FreeBSD_HEAD-modules] $ /bin/sh -xe /tmp/hudson8704331225077297218.sh
+ export JFLAG=-j4
+ export MAKESYSPATH=<https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/mk>
+ cd <https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/sys/modules>
+ echo '=== make cleandir ==='
=== make cleandir ===
+ make cleandir
===> aac (cleandir)
make[1]: "<https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/sys/modules/aac/../../conf/kern.opts.mk"> line 24: Could not find ../../share/mk/bsd.mkopt.mk
make[1]: "<https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/sys/modules/aac/../../conf/kern.mk"> line 38: Malformed conditional (${MK_FORMAT_EXTENSIONS} == "no")
make[1]: Fatal errors encountered -- cannot continue
make[1]: stopped in <https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/sys/modules/aac>
*** Error code 1

Stop.
make: stopped in <https://jenkins.freebsd.org/jenkins/job/FreeBSD_HEAD-modules/ws/sys/modules>
Build step 'Execute shell' marked build as failure