testing/firefox: rebuild against icu-63.1

Restore a missing patch mistankenly removed by 00b1814ef62a2f7138b6354f44e8f4fa0d4df884

testing/firefox/APKBUILD

@@ -4,7 +4,7 @@ pkgname=firefox
 pkgver=62.0.3
 _pkgver=$pkgver
 _xulver=$pkgver
-pkgrel=1
+pkgrel=2
 pkgdesc="Firefox web browser"
 url="https://www.firefox.com/"
 # limited by rust and cargo

testing/firefox/rust-unitialized-field.patch

@@ -0,0 +1,19 @@
+--- ./media/audioipc/audioipc/src/cmsg.rs.orig	2018-05-09 22:19:14.748631939 +0200
++++ ./media/audioipc/audioipc/src/cmsg.rs	2018-05-09 22:19:22.961620862 +0200
+@@ -106,11 +106,11 @@ impl ControlMsgBuilder {
+                 return Err(Error::NoSpace);
+             }
+ 
+-            let cmsghdr = cmsghdr {
+-                cmsg_len: cmsg_len as _,
+-                cmsg_level: level,
+-                cmsg_type: kind,
+-            };
++            use std::mem;
++            let mut cmsghdr: cmsghdr =  unsafe { mem::zeroed() };
++            cmsghdr.cmsg_len = cmsg_len as _;
++            cmsghdr.cmsg_level = level;
++            cmsghdr.cmsg_type = kind;
+ 
+             let cmsghdr = unsafe {
+                 slice::from_raw_parts(&cmsghdr as *const _ as *const _, mem::size_of::<cmsghdr>())