Attempt to fix pkgconfig for openssl

Author: rnijveld

.github/workflows/docker.yml

@@ -44,8 +44,10 @@ jobs:
         include:
           - rust_arch: aarch64-unknown-linux-gnu
             docker_arch: arm64
+            debian_lib_arch: aarch64
           - rust_arch: x86_64-unknown-linux-gnu
             docker_arch: amd64
+            debian_lib_arch: amd64
     runs-on: ubuntu-22.04
     steps:
       - name: Setup Rust toolchain
@@ -82,6 +84,8 @@ jobs:
           [target.aarch64-unknown-linux-gnu]
           linker = "aarch64-linux-gnu-gcc"
           EOF
+          export PKG_CONFIG_ALLOW_CROSS=1
+          export PKG_CONFIG_PATH=/usr/lib/${{ matrix.debian_lib_arch }}-linux-gnu/pkgconfig
           cargo build --release --target ${{ matrix.rust_arch }} --features optimizations
           mv target/${{ matrix.rust_arch }}/release/dx target/dx.${{ matrix.docker_arch }}