Bump LLVM compat (#462)

Author: maleadt

Project.toml

@@ -33,7 +33,7 @@ ExprTools = "0.1"
 GPUArrays = "10"
 GPUCompiler = "0.23, 0.24, 0.25, 0.26, 0.27"
 KernelAbstractions = "0.9.1"
-LLVM = "6, 7, 8"
+LLVM = "6, 7, 8, 9"
 NEO_jll = "=24.26.30049"
 Preferences = "1"
 SPIRV_LLVM_Translator_unified_jll = "0.4"