wstd-aws: paper over build failures by pinning crc-fast to 1.3.0 (#114)

when cargo is able to select the latest compatible wass-sdk-s3 1.119.0,
it selects aws-smithy-checksums 0.63.12, and in turn selects crc-fast
1.6.0, which runs into a bug in wasm-ld.

Until the bug in wasm-ld or crc-fast is fixed, this makes it possible
for wstd ci to pass.

Author: pchickey

aws/Cargo.toml

@@ -23,3 +23,9 @@ wstd.workspace = true
 aws-config.workspace = true
 aws-sdk-s3.workspace = true
 clap.workspace = true
+# crc-fast is a transitive dep via aws-smithy-checksums, which
+# is a dep of aws-sdk-s3 and others.
+# When cargo resolves crc-fast to 1.6.0 via aws-smiothy-checksums 0.63.12,
+# wasm-ld will crash building crc-fast. Until this is resolved, pinning
+# crc-fast is the simplest way to avoid it
+crc-fast = "=1.3.0"