[pkgsrc/trunk]: pkgsrc/lang/rust revert my change for now

[tnn <tnn%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/b7bde49dd2d3
branches:  trunk
changeset: 412957:b7bde49dd2d3
user:      tnn <tnn%pkgsrc.org@localhost>
date:      Fri Mar 13 21:49:32 2020 +0000

description:
revert my change for now

Was able to reproduce the hang again. Working on reduced test case.

diffstat:

 lang/rust/Makefile |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (18 lines):

diff -r aa7206c648ae -r b7bde49dd2d3 lang/rust/Makefile
--- a/lang/rust/Makefile        Fri Mar 13 21:03:41 2020 +0000
+++ b/lang/rust/Makefile        Fri Mar 13 21:49:32 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.155 2020/03/13 18:34:53 jperkin Exp $
+# $NetBSD: Makefile,v 1.156 2020/03/13 21:49:32 tnn Exp $
 
 DISTNAME=      rustc-1.42.0-src
 PKGNAME=       ${DISTNAME:S/rustc/rust/:S/-src//}
@@ -130,7 +130,7 @@
 .endif
 
 # toolchain/54192, induces rtld issues
-.if ${OPSYS} == "NetBSD" && (defined(BATCH) || ${PKG_DEVELOPER:Uno} == "no")
+.if ${OPSYS} == "NetBSD"
 MAKE_JOBS_SAFE=        no
 .endif