iverilog: fix crash in lxt2 dump.

srcpkgs/iverilog/patches/lxt2.patch

@@ -0,0 +1,15 @@
+vcd_work_terminate() calls pthread_join() on a static thread.
+Do not call vcd_work_terminate() in close_dumpfile() because it was already
+called before, leading to a second call to pthread_join() on the same pthread,
+which is undefined behaviour.
+
+--- vpi/sys_lxt2.c.orig	2020-05-13 00:25:45.070186668 +0200
++++ vpi/sys_lxt2.c	2020-05-13 00:26:09.721185704 +0200
+@@ -472,7 +472,6 @@
+ 
+ static void *close_dumpfile(void)
+ {
+-      vcd_work_terminate();
+       lxt2_wr_close(dump_file);
+       dump_file = NULL;
+       return NULL;

srcpkgs/iverilog/template

@@ -1,13 +1,13 @@
 # Template file for 'iverilog'
 pkgname=iverilog
 version=10.3
-revision=1
+revision=2
 wrksrc="${pkgname}-${version/./_}"
 build_style=gnu-configure
 hostmakedepends="automake flex gperf"
 makedepends="readline-devel zlib-devel"
 short_desc="Verilog simulation and synthesis tool"
-maintainer="Orphaned <orphan@voidlinux.org>"
+maintainer="Johannes <johannes.brechtmann@gmail.com>"
 license="GPL-2.0-or-later, LGPL-2.1-or-later"
 homepage="http://iverilog.icarus.com/"
 distfiles="https://github.com/steveicarus/iverilog/archive/v${version/./_}.tar.gz"