Add patch to work with new parking_lot

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

0001-chore-Update-parking_lot-to-0.8.patch

@@ -0,0 +1,57 @@
+From 586a7e58b87d0f7418c798059c2e08e2e4bda26a Mon Sep 17 00:00:00 2001
+From: Igor Gnatenko <i.gnatenko.brain@gmail.com>
+Date: Mon, 6 May 2019 15:30:58 +0200
+Subject: [PATCH] chore: Update parking_lot to 0.8
+
+Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
+---
+ src/imp_pl.rs | 6 +++---
+ src/lib.rs    | 2 +-
+ 2 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/imp_pl.rs b/src/imp_pl.rs
+index 8dbd853..c14ac4d 100644
+--- a/src/imp_pl.rs
++++ b/src/imp_pl.rs
+@@ -1,7 +1,7 @@
+ extern crate parking_lot;
+ 
+ use std::cell::UnsafeCell;
+-use self::parking_lot::{Once, ONCE_INIT, OnceState};
++use self::parking_lot::{Once, OnceState};
+ 
+ /// A thread-safe cell which can be written to only once.
+ ///
+@@ -55,14 +55,14 @@ impl<T: PartialEq> PartialEq for OnceCell<T> {
+ impl<T> OnceCell<T> {
+     /// An empty cell, for initialization in a `const` context.
+     pub const INIT: OnceCell<T> = OnceCell {
+-        once: ONCE_INIT,
++        once: Once::new(),
+         value: UnsafeCell::new(None),
+     };
+ 
+     /// Creates a new empty cell.
+     pub fn new() -> OnceCell<T> {
+         OnceCell {
+-            once: ONCE_INIT,
++            once: Once::new(),
+             value: UnsafeCell::new(None),
+         }
+     }
+diff --git a/src/lib.rs b/src/lib.rs
+index 3aef107..a5625aa 100644
+--- a/src/lib.rs
++++ b/src/lib.rs
+@@ -160,7 +160,7 @@ unifies the APIs of those crates.
+ To implement a sync flavor of `OnceCell`, this crates uses either `::std::sync::Once` or
+ `::parking_lot::Once`. This is controlled by the `parking_lot` feature, which is enabled by default.
+ 
+-When using `parking_lot`, the crate is compatible with rustc 1.25.0, without `parking_lot` a minimum
++When using `parking_lot`, the crate is compatible with rustc 1.31.0, without `parking_lot` a minimum
+ of `1.29.0` is required.
+ 
+ This crate uses unsafe.
+-- 
+2.21.0
+

rust-once_cell.spec

@@ -17,6 +17,8 @@ Source:         %{crates_source}
 # * Exclude unnecessary files, https://github.com/matklad/once_cell/pull/12
 # * Update parking_lot to 0.8, https://github.com/matklad/once_cell/pull/11
 Patch0:         once_cell-fix-metadata.diff
+# Make it work with new parking_lot
+Patch0001:      0001-chore-Update-parking_lot-to-0.8.patch
 
 ExclusiveArch:  %{rust_arches}