Assign RUSTSEC-2020-0015 to openssl-src

Original PR: https://github.com/RustSec/advisory-db/pull/277/files

Author: tarcieri

crates/openssl-src/RUSTSEC-0000-0000.toml renamed to crates/openssl-src/RUSTSEC-2020-0015.toml

@@ -1,5 +1,5 @@
 [advisory]
-id = "RUSTSEC-0000-0000"
+id = "RUSTSEC-2020-0015"
 package = "openssl-src"
 date = "2020-04-25"
 title = "Crash causing Denial of Service attack"