Print commit hashes for debugging

Author: arik-so

.github/workflows/swift.yml

@@ -21,10 +21,12 @@ jobs:
                     # git checkout origin/2021-03-java-bindings-base
                     # git checkout v0.0.100
                     git checkout dba15b73610e4f54378782e55874fc694bf8bda9
+                    git rev-parse HEAD
                     cd ..
                     git clone https://github.com/lightningdevkit/ldk-c-bindings
                     cd ldk-c-bindings
                     git checkout v0.0.100.1
+                    git rev-parse HEAD
                     cd ..
             -   name: Install native Rust toolchain, Valgrind, and build utilitis
                 run: |