Architecture specific change in rpms/firefox.git

The package rpms/firefox.git has added or updated architecture specific content in its
spec file (ExclusiveArch/ExcludeArch or %ifarch/%ifnarch) in commit(s):
https://src.fedoraproject.org/cgit/rpms/firefox.git/commit/?id=2fdca9bc5b469....

Change:
-ExclusiveArch: %{ix86} x86_64

Thanks.

Full change:
============

commit 2fdca9bc5b4693bc1dd5a13b4d2b4e91d30bf4d3
Author: Martin Stransky 
Date:   Fri Sep 29 15:21:17 2017 +0200

Enabled second arches to challenge world of build failures, miscompilations and misery

diff --git a/firefox.spec b/firefox.spec
index 5b582ab..d506c60 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -1,5 +1,3 @@
-ExclusiveArch: %{ix86} x86_64
-
 # Use ALSA backend?
 %define alsa_backend      0

@@ -101,7 +99,7 @@ ExclusiveArch: %{ix86} x86_64
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        56.0
-Release:        2%{?pre_tag}%{?dist}
+Release:        3%{?pre_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -871,6 +869,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------

%changelog
+* Fri Sep 29 2017 Martin Stransky  - 56.0-3
+- Enabled second arches.
+
 * Mon Sep 25 2017 Martin Stransky  - 56.0-2
 - Update to 56.0 (B6)