HEADSUP: after r313194 on freebsd-current, lang/gcc ports require a rebuild

[Steve Kargl]

r313194 defined vm_ooffset_t and vm_pindex_t in sys/types.h.
I believe that forces a recompile of lang/gcc ports, and
probably anything built with the lang/gcc port to avoid 
dependency issue.  Neither "pkg audit -q" nor "pkg version -vl '<'"
pick up this issue.

% make 
gcc6 -o hex -O2 -pipe -static -Wall -fno-builtin -I/usr/local/include -I../mp -I../libm/msun/src -I../libm/libc/include -I../libm/libc/i386 hex.c -lm
In file included from /usr/local/lib/gcc6/gcc/x86_64-portbld-freebsd12.0/6.3.0/include-fixed/unistd.h:46:0,
                 from hex.c:6:
/usr/local/lib/gcc6/gcc/x86_64-portbld-freebsd12.0/6.3.0/include-fixed/sys/types.h:266:9: error: unknown type name '__vm_ooffset_t'
 typedef __vm_ooffset_t vm_ooffset_t;
         ^~~~~~~~~~~~~~
/usr/local/lib/gcc6/gcc/x86_64-portbld-freebsd12.0/6.3.0/include-fixed/sys/types.h:268:9: error: unknown type name '__vm_pindex_t'
 typedef __vm_pindex_t vm_pindex_t;
         ^~~~~~~~~~~~~
*** Error code 1

% uname -a
FreeBSD troutmask.apl.washington.edu 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r312992: Mon Jan 30 13:00:38 PST 2017     kargl at troutmask.apl.washington.edu:/data/obj/usr/src/sys/SPEW  amd64

% ll /usr/local/bin/gcc6
-r-xr-xr-x  3 root  wheel  - 936640 Jan  2 14:21 /usr/local/bin/gcc6*

-- 
Steve
20161221 https://www.youtube.com/watch?v=IbCHE-hONow