MAKE_JOBS_SAFE= yes for ham/gnuradio-doxygen

[Makoto Fujiwara <makoto%ki.nu@localhost>]

ham/gnuradio-doxygen has set as
  MAKE_JOBS_SAFE=	no

But this was at the year of 2014, and I had committed this line
(I believe), but I don't remember why.

At least with four thread, 
  MAKE_JOBS_SAFE= YES
is OK.

Any objection ?
Thank you,
-- 
Makoto Fujiwara
mef%NetBSD.org@localhost
makoto%if.t.u-tokyo.ac.jp@localhost

Index: ham/gnuradio-doxygen/Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/ham/gnuradio-doxygen/Makefile,v
retrieving revision 1.24
diff -u -r1.24 Makefile
--- ham/gnuradio-doxygen/Makefile	25 Feb 2019 23:37:38 -0000	1.24
+++ ham/gnuradio-doxygen/Makefile	5 May 2019 14:39:21 -0000
@@ -19,6 +19,6 @@
 CMAKE_ARGS+=	-DENABLE_DOXYGEN=ON
 CMAKE_ARGS+=	-DENABLE_SPHINX=ON
 
-MAKE_JOBS_SAFE=	no
+#MAKE_JOBS_SAFE=	no
 
 .include	"../../mk/bsd.pkg.mk"