d: print environment and remove target output prior to compilation

Author: arik-so

.github/workflows/swift.yml

@@ -97,13 +97,17 @@ jobs:
             -   name: Build Swift bindings package without address sanitizer
                 run: |
                     cd ci/LDKSwift
+                    env
+                    # remove target output
+                    rm -rf ${{ github.workspace }}/ci/ldk-c-bindings/lightning-c-bindings/target
                     ../../swift-5.7.2-RELEASE-ubuntu22.04/usr/bin/swift build
                 env:
                     LDK_C_BINDINGS_BASE: ${{ github.workspace }}/ci/ldk-c-bindings
                     RUST_BACKTRACE: 1
             -   name: Test Swift bindings package without address sanitizer
                 run: |
                     cd ci/LDKSwift
+                    env
                     ../../swift-5.7.2-RELEASE-ubuntu22.04/usr/bin/swift test -v
                 env:
                     LDK_C_BINDINGS_BASE: ${{ github.workspace }}/ci/ldk-c-bindings