Awscrt

BUGFIX: Simplify build process so piwheels.org can build our wheels again

* Fixes an issue where some characters in the uri path component were not being properly encoded during canonical request construction when using Sigv4 signing

- support non-ascii file path for windows

- BUGFIX: several memory leaks fixed
- `awscrt.eventstream.rpc.ClientConnection` was leaking its native part
- `awscrt.eventstream.rpc.ClientContinuation` was leaking incoming headers
- `awscrt.http.HttpRequest` was leaking its headers
- `awscrt.auth.AwsSigningConfig` was leaking its native part
- each call to `awscrt.auth.aws_sign_request()` was leaking native native data
- BUGFIX: Fix errors when application is running on Windows for 21 days
- OPTIMIZATION: `awscrt.s3.S3Request` closes file handles earlier

* Updating aws-c-auth submodule
* Updating aws-c-common submodule
* Updating aws-c-mqtt submodule
* Updating aws-c-io submodule
* BUG FIX: Fixed a file stream reading issue. This will fix an issue on Windows when uploading using the S3 Client and the send_filepath argument. Previously, the underlying data stream could terminate early.
* Updating aws-c-s3 submodule
* BUG FIX: Fixed abort-multipart-upload messages not being sent when a multipart upload failed or was cancelled.