update llvm to 0611a668 (#1932)

Author: fifield

utils/clone-llvm.sh

@@ -13,8 +13,8 @@
 ##===----------------------------------------------------------------------===##
 
 # The LLVM commit to use.
-LLVM_PROJECT_COMMIT=08af115d97e39223b5cc8bdbc56b1dfb758bf6d3
-DATETIME=2024111004
+LLVM_PROJECT_COMMIT=0611a668d1389c8573e83eeafa6d5f6172c4cbc2
+DATETIME=2024111917
 WHEEL_VERSION=20.0.0.$DATETIME+${LLVM_PROJECT_COMMIT:0:8}
 
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