[PR PATCH] firefox: fix sandbox crash on musl

[jnbr <jnbr@users.noreply.github.com>]

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There is a new pull request by jnbr against master on the void-packages repository

https://github.com/jnbr/void-packages firefox-fork
https://github.com/void-linux/void-packages/pull/21531

firefox: fix sandbox crash on musl
fixes #21245 

A patch file from https://github.com/void-linux/void-packages/pull/21531.patch is attached

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From 3302b469d8fc87eff4059cd0fe52ab5a4f562b14 Mon Sep 17 00:00:00 2001
From: Johannes <johannes.brechtmann@gmail.com>
Date: Fri, 1 May 2020 17:20:29 +0200
Subject: [PATCH] firefox: fix sandbox crash on musl

[ci skip]
---
 srcpkgs/firefox/patches/sandbox-fork.patch | 13 +++++++++++++
 srcpkgs/firefox/template                   |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 srcpkgs/firefox/patches/sandbox-fork.patch

diff --git a/srcpkgs/firefox/patches/sandbox-fork.patch b/srcpkgs/firefox/patches/sandbox-fork.patch
new file mode 100644
index 00000000000..72640cb7f70
--- /dev/null
+++ b/srcpkgs/firefox/patches/sandbox-fork.patch
@@ -0,0 +1,13 @@
+make SYS_fork non-fatal, musl uses it for fork(2)
+
+--- security/sandbox/linux/SandboxFilter.cpp
++++ security/sandbox/linux/SandboxFilter.cpp
+@@ -1253,6 +1253,8 @@
+         // usually do something reasonable on error.
+       case __NR_clone:
+         return ClonePolicy(Error(EPERM));
++      case __NR_fork:
++        return Error(ENOSYS);
+ 
+ #  ifdef __NR_fadvise64
+       case __NR_fadvise64:
diff --git a/srcpkgs/firefox/template b/srcpkgs/firefox/template
index 801e503b3a4..24d71479b77 100644
--- a/srcpkgs/firefox/template
+++ b/srcpkgs/firefox/template
@@ -4,7 +4,7 @@
 #
 pkgname=firefox
 version=75.0
-revision=1
+revision=2
 build_helper="rust"
 short_desc="Mozilla Firefox web browser"
 maintainer="Johannes <johannes.brechtmann@gmail.com>"