Add release checksums for opusfile 0.9, 0.10, and 0.11.

We keep checksums of the release packages in the repo as a
redundant and trustworthy reference.

Author: rillian

releases.sha2

@@ -15,3 +15,9 @@ b940d62beb15b5974764574b9f265481fe5b6ee16902fb705727546caf956261  opusfile-0.5.z
 c4c4c57b6b4bc9780a08c1e6300cc35846671bee61d8487c277ea1e8041cfbf8  opusfile-0.7-win32.zip
 2c231ed3cfaa1b3173f52d740e5bbd77d51b9dfecb87014b404917fba4b855a4  opusfile-0.8.tar.gz
 89dff4342c3b789574cbea5c57f11b96d4ebe4d28ab90248c1783ea569b1e9e3  opusfile-0.8.zip
+f75fb500e40b122775ac1a71ad80c4477698842a8fe9da4a1b4a1a9f16e4e979  opusfile-0.9.tar.gz
+e9591da4d4c9e857436c2d46a28a9e470fa5355ea5a76d4d582f137d18755d36  opusfile-0.9.zip
+48e03526ba87ef9cf5f1c47b5ebe3aa195bd89b912a57060c36184a6cd19412f  opusfile-0.10.tar.gz
+9d9e95d01817ecf48bf6daaea8f071f9b45bd1751ca1fc8ce50e5075eb2bc3c8  opusfile-0.10.zip
+74ce9b6cf4da103133e7b5c95df810ceb7195471e1162ed57af415fabf5603bf  opusfile-0.11.tar.gz
+23c5168026c4f1fc34843650135b409d0fc8cf452508163b4ece8077256ac6ff  opusfile-0.11.zip