Update license file to note libbacktrace

tqchen · web-flow · commit 7b3a22e465dd · 2021-11-12T16:24:02.000-05:00
diff --git a/LICENSE b/LICENSE
@@ -242,4 +242,5 @@ The Unlicense
 BSD 3-Clause "New" or "Revised" License
 ---------------------------------------
 
-3rdparty/cutlass
+3rdparty/cutlass
+3rdparty/libbacktrace
