[1/7] gnu: aws-c-common: Update to 0.5.1.

[2/7] gnu: aws-checksums: Update to 0.1.11.

[3/7] gnu: Add aws-c-cal.

[4/7] gnu: Add s2n.

[5/7] gnu: Add aws-c-io.

[6/7] gnu: aws-c-event-stream: Update to 0.2.6.

[7/7] gnu: aws-sdk-cpp: Update to 1.8.148.