Bug 1911714 - Enable sccache on base-toolchains-clang tasks. r=firefo…

…x-build-system-reviewers,sergesanspaille

It was disabled in bug 1525760 because of rust-lang/rust#58393
but since then we actually implemented a workaround (in bug 1601704)

That workaround, however, is also needed on the newly added
crashreporter crate.

Ironically, if these tasks had had sccache enabled in the first place,
bug 1911513 wouldn't have been caught.

Differential Revision: https://phabricator.services.mozilla.com/D218611

taskcluster/kinds/build/linux-base-toolchains.yml

@@ -120,6 +120,7 @@ linux64-base-toolchains-clang/opt:
         script: "mozharness/scripts/fx_desktop_build.py"
         secrets: true
         tooltool-downloads: public
+    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils-2.31.1
@@ -130,6 +131,7 @@ linux64-base-toolchains-clang/opt:
             - linux64-nasm-2.14.02
             - linux64-node-12
             - linux64-pkgconf
+            - linux64-sccache
             - sysroot-x86_64-linux-gnu
             - sysroot-wasm32-wasi-clang-8.0
 
@@ -159,6 +161,7 @@ linux64-base-toolchains-clang/debug:
         custom-build-variant-cfg: debug
         mozconfig-variant: debug
         tooltool-downloads: public
+    use-sccache: true
     fetches:
         toolchain:
             - linux64-binutils-2.31.1
@@ -169,5 +172,6 @@ linux64-base-toolchains-clang/debug:
             - linux64-nasm-2.14.02
             - linux64-node-12
             - linux64-pkgconf
+            - linux64-sccache
             - sysroot-x86_64-linux-gnu
             - sysroot-wasm32-wasi-clang-8.0

toolkit/crashreporter/client/app/Cargo.toml

@@ -28,6 +28,9 @@ unic-langid = { version = "0.9.1" }
 uuid = { version = "1", features = ["v4", "serde"] }
 zip = { version = "2.1.2", default-features = false }
 
+# Workarounds for https://github.com/rust-lang/rust/issues/58393
+lmdb-rkv-sys = "0.11"
+
 [target."cfg(target_os = \"macos\")".dependencies]
 block = "0.1"
 cocoa = { package = "cocoabind", path = "../cocoabind" }