Merge pull request #3759 from jperrin/master

add centos 6 i386 support

library/centos

@@ -15,6 +15,9 @@ Architectures: amd64, arm64v8, ppc64le
 Tags: centos6, 6
 GitFetch: refs/heads/CentOS-6
 GitCommit: 7a8a83bf6d26ea9ce9bb2ac7f4ad9265c65a69de
+i386-GitFetch: refs/heads/CentOS-6i386
+i386-GitCommit: 90afcbe0947956bb2715e933138244bc91f3fd61
+Architectures: amd64, i386
 
 Tags: centos7.4.1708, 7.4.1708
 GitFetch: refs/heads/CentOS-7.4.1708