Fix #1085 for real

cross doesn't pass all environment variables through into the build
container, so JEMALLOC_SYS_WITH_LG_PAGE=16 wasn't being picked up from
the host.  Instead, set it explicitly in Cross.toml.

Link: https://github.com/cross-rs/cross/wiki/Configuration

.github/workflows/CICD.yml

@@ -134,11 +134,7 @@ jobs:
 
     - name: Build
       shell: bash
-      run: |
-        case ${{ matrix.job.target }} in
-          aarch64-*) export JEMALLOC_SYS_WITH_LG_PAGE=16 ;;
-        esac;
-        $BUILD_CMD build --locked --release --target=${{ matrix.job.target }}
+      run: $BUILD_CMD build --locked --release --target=${{ matrix.job.target }}
 
     - name: Set binary name & path
       id: bin

Cross.toml

@@ -0,0 +1,6 @@
+# https://github.com/sharkdp/fd/issues/1085
+[target.aarch64-unknown-linux-gnu.env]
+passthrough = ["JEMALLOC_SYS_WITH_LG_PAGE=16"]
+
+[target.aarch64-unknown-linux-musl.env]
+passthrough = ["JEMALLOC_SYS_WITH_LG_PAGE=16"]