Merge branch 'rust' into 'master'

Rust bump

Builds on pmmx/x86_64/ppc64/aarch64. Successfully builds Firefox.

Still fails 17 tests on ppc32, but the ICE has been fixed:

```
    [run-make] run-make-fulldeps/exit-code
    [run-make] run-make-fulldeps/extern-fn-generic
    [run-make] run-make-fulldeps/extern-fn-struct-passing-abi
    [run-make] run-make-fulldeps/extern-fn-with-packed-struct
    [run-make] run-make-fulldeps/extern-fn-with-union
    [run-make] run-make-fulldeps/issue-25581
    [run-make] run-make-fulldeps/relocation-model
    [run-pass] run-pass/extern/extern-pass-TwoU16s.rs
    [run-pass] run-pass/extern/extern-pass-TwoU32s.rs
    [run-pass] run-pass/extern/extern-pass-TwoU64s.rs
    [run-pass] run-pass/extern/extern-pass-TwoU8s.rs
    [run-pass] run-pass/extern/extern-pass-empty.rs
    [run-pass] run-pass/foreign/foreign-fn-with-byval.rs
    [run-pass] run-pass/issues/issue-28676.rs
    [run-pass] run-pass/structs-enums/struct-return.rs
    [run-pass] run-pass/threads-sendsync/thread-local-extern-static.rs
    [run-pass] run-pass/union/union-c-interop.rs
```

See merge request !232

1 files changed, 0 insertions, 67 deletions

diff --git a/user/rust/0008-test-enum-debug-Correct-minimum-LLVM-version.patch b/user/rust/0008-test-enum-debug-Correct-minimum-LLVM-version.patch
deleted file mode 100644
index dddaf75bf..000000000
--- a/user/rust/0008-test-enum-debug-Correct-minimum-LLVM-version.patch
+++ /dev/null
@@ -1,67 +0,0 @@
-From 8dbda1b85a15b04300f73eb30c1e2da196750cfb Mon Sep 17 00:00:00 2001
-From: Samuel Holland <samuel@sholland.org>
-Date: Fri, 22 Mar 2019 17:08:06 -0500
-Subject: [PATCH 08/14] test/enum-debug*: Correct minimum LLVM version
-
----
- src/test/codegen/enum-debug-clike.rs   | 2 +-
- src/test/codegen/enum-debug-niche-2.rs | 2 +-
- src/test/codegen/enum-debug-niche.rs   | 2 +-
- src/test/codegen/enum-debug-tagged.rs  | 2 +-
- 4 files changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/src/test/codegen/enum-debug-clike.rs b/src/test/codegen/enum-debug-clike.rs
-index 98f07505f7..11e2fae596 100644
---- a/src/test/codegen/enum-debug-clike.rs
-+++ b/src/test/codegen/enum-debug-clike.rs
-@@ -4,7 +4,7 @@
- 
- // ignore-tidy-linelength
- // ignore-windows
--// min-system-llvm-version 7.0
-+// min-system-llvm-version 8.0
- 
- // compile-flags: -g -C no-prepopulate-passes
- 
-diff --git a/src/test/codegen/enum-debug-niche-2.rs b/src/test/codegen/enum-debug-niche-2.rs
-index 369fa1fcfd..aa6cbf66b4 100644
---- a/src/test/codegen/enum-debug-niche-2.rs
-+++ b/src/test/codegen/enum-debug-niche-2.rs
-@@ -4,7 +4,7 @@
- 
- // ignore-tidy-linelength
- // ignore-windows
--// min-system-llvm-version 7.0
-+// min-system-llvm-version 8.0
- 
- // compile-flags: -g -C no-prepopulate-passes
- 
-diff --git a/src/test/codegen/enum-debug-niche.rs b/src/test/codegen/enum-debug-niche.rs
-index 1273a785ba..93eebde7b8 100644
---- a/src/test/codegen/enum-debug-niche.rs
-+++ b/src/test/codegen/enum-debug-niche.rs
-@@ -4,7 +4,7 @@
- 
- // ignore-tidy-linelength
- // ignore-windows
--// min-system-llvm-version 7.0
-+// min-system-llvm-version 8.0
- 
- // compile-flags: -g -C no-prepopulate-passes
- 
-diff --git a/src/test/codegen/enum-debug-tagged.rs b/src/test/codegen/enum-debug-tagged.rs
-index 5c37e40c27..84976ce97a 100644
---- a/src/test/codegen/enum-debug-tagged.rs
-+++ b/src/test/codegen/enum-debug-tagged.rs
-@@ -4,7 +4,7 @@
- 
- // ignore-tidy-linelength
- // ignore-windows
--// min-system-llvm-version 7.0
-+// min-system-llvm-version 8.0
- 
- // compile-flags: -g -C no-prepopulate-passes
- 
--- 
-2.21.0
-