Forward more envvars.

Author: Alexhuszagh

ci/test-docker-in-docker.sh

@@ -15,8 +15,9 @@ source=$(realpath "${source}")
 home=$(dirname "${source}")
 
 main() {
-    docker run -v "${home}":/project \
-        -w /project --rm -e TARGET -e RUSTFLAGS \
+    docker run -v "${home}":/project -w /project \
+        --rm -e TARGET -e RUSTFLAGS -e RUST_TEST_THREADS \
+        -e LLVM_PROFILE_FILE -e CARGO_INCREMENTAL \
         -v /var/run/docker.sock:/var/run/docker.sock \
         docker:18.09-dind sh -c '
 #!/usr/bin/env sh