Fix uniffi revision

I messed up the revision on by FFI branch.  I picked the first commit,
rather than the final commit.  The first commit was just some prepatory
refactors, so wasn't having any effect.

See https://github.com/mozilla/uniffi-rs/commits/kotlin-pointer-ffi/

Author: bendk

Cargo.lock

@@ -156,6 +156,6 @@ lto = "thin"
 
 [patch.crates-io]
 # uniffi is using an experimental ffi based on 0.31.
-uniffi = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "106e12ae2a0474a1880667ed3a4b050fcf1c6666" }
-uniffi_bindgen = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "106e12ae2a0474a1880667ed3a4b050fcf1c6666" }
-uniffi_pipeline = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "106e12ae2a0474a1880667ed3a4b050fcf1c6666" }
+uniffi = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "76eacf42894b5a463d928a74d8077418633a6974" }
+uniffi_bindgen = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "76eacf42894b5a463d928a74d8077418633a6974" }
+uniffi_pipeline = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "76eacf42894b5a463d928a74d8077418633a6974" }