Bug 1632735 - Upgrade valgrind builds to the same rust version as other builds. r=erahm

And add suppressions for the new errors that this adds to the valgrind
run. It's not clear if it's a legitimate thing that LLVM does that
valgrind doesn't cope with, like many others, but the fact is running
valgrind on a PGO/LTO build doesn't show these errors, so we're not
actually shipping them anyways (but does show _different_ errors that we
don't see on the build the valgrind jobs do)

Differential Revision: https://phabricator.services.mozilla.com/D81016

build/valgrind/x86_64-pc-linux-gnu.sup

@@ -979,3 +979,34 @@
    obj:/*/lib*/libLLVM-3.6-mesa.so
    obj:/*/lib*/libLLVM-3.6-mesa.so
 }
+
+{
+   bug 1632735
+   Memcheck:Cond
+   fun:_ZN9selectors6parser25parse_one_simple_selector17h*
+   fun:_ZN9selectors6parser14parse_selector17h*
+   fun:_ZN9selectors6parser24SelectorList$LT$Impl$GT$16parse_with_state17h*
+}
+
+{
+   bug 1632735
+   Memcheck:Cond
+   fun:_ZN9selectors6parser25parse_one_simple_selector17h*
+   fun:_ZN9selectors6parser29parse_functional_pseudo_class17h*
+   fun:_ZN9selectors6parser25parse_one_simple_selector17h*
+   fun:_ZN9selectors6parser14parse_selector17h*
+   fun:_ZN9selectors6parser24SelectorList$LT$Impl$GT$16parse_with_state17h*
+}
+
+{
+   bug 1632735
+   Memcheck:Cond
+   fun:_ZN9selectors6parser25parse_one_simple_selector17h*
+   fun:_ZN9selectors6parser14parse_selector17h*
+   fun:_ZN9cssparser6parser18parse_until_before17h*
+   fun:_ZN5style5gecko15selector_parser94_$LT$impl$u20$selectors..parser..Parser$u20$for$u20$style..selector_parser..SelectorParser$GT$36parse_non_ts_functional_pseudo_class17h*
+   fun:_ZN9selectors6parser29parse_functional_pseudo_class17h*
+   fun:_ZN9selectors6parser25parse_one_simple_selector17*
+   fun:_ZN9selectors6parser14parse_selector17h*
+   fun:_ZN9selectors6parser24SelectorList$LT$Impl$GT$16parse_with_state17h*
+}

taskcluster/ci/valgrind/kind.yml

@@ -49,8 +49,7 @@ jobs:
             toolchain:
                 - linux64-binutils
                 - linux64-clang
-                # bug 1632735
-                - linux64-rust-1.41
+                - linux64-rust
                 - linux64-cbindgen
                 - linux64-sccache
                 - linux64-nasm