Update URLs for libritts (pytorch#2074)

Summary:
The urls for this dataset seem to have changed so I am updating to the new location

Pull Request resolved: pytorch#2074

Reviewed By: mthrok

Differential Revision: D33234996

Pulled By: jdsgomes

fbshipit-source-id: e09c35a122e8227fcce7fa97aeeeea312cb89173

torchaudio/datasets/libritts.py

@@ -13,13 +13,13 @@
 URL = "train-clean-100"
 FOLDER_IN_ARCHIVE = "LibriTTS"
 _CHECKSUMS = {
-    "http://www.openslr.org/60/dev-clean.tar.gz": "0c3076c1e5245bb3f0af7d82087ee207",
-    "http://www.openslr.org/60/dev-other.tar.gz": "815555d8d75995782ac3ccd7f047213d",
-    "http://www.openslr.org/60/test-clean.tar.gz": "7bed3bdb047c4c197f1ad3bc412db59f",
-    "http://www.openslr.org/60/test-other.tar.gz": "ae3258249472a13b5abef2a816f733e4",
-    "http://www.openslr.org/60/train-clean-100.tar.gz": "4a8c202b78fe1bc0c47916a98f3a2ea8",
-    "http://www.openslr.org/60/train-clean-360.tar.gz": "a84ef10ddade5fd25df69596a2767b2d",
-    "http://www.openslr.org/60/train-other-500.tar.gz": "7b181dd5ace343a5f38427999684aa6f",
+    "http://www.openslr.org/resources/60/dev-clean.tar.gz": "0c3076c1e5245bb3f0af7d82087ee207",
+    "http://www.openslr.org/resources/60/dev-other.tar.gz": "815555d8d75995782ac3ccd7f047213d",
+    "http://www.openslr.org/resources/60/test-clean.tar.gz": "7bed3bdb047c4c197f1ad3bc412db59f",
+    "http://www.openslr.org/resources/60/test-other.tar.gz": "ae3258249472a13b5abef2a816f733e4",
+    "http://www.openslr.org/resources/60/train-clean-100.tar.gz": "4a8c202b78fe1bc0c47916a98f3a2ea8",
+    "http://www.openslr.org/resources/60/train-clean-360.tar.gz": "a84ef10ddade5fd25df69596a2767b2d",
+    "http://www.openslr.org/resources/60/train-other-500.tar.gz": "7b181dd5ace343a5f38427999684aa6f",
 }