Add -L to the curl command to download openssl-1.0.2 (#3846)

The GitHub workflow for `exotic platform` downloads the `openssl.sh`
script, which tries to download
`https://www.openssl.org/source/openssl-1.0.2t.tar.gz`

, but the file has
been permanently moved. This PR updates the `curl` command to include
the `-L` option.

Co-authored-by: Fahad Zubair <fahadzub@amazon.com>