Bump GPUCompiler. (#404)

Author: maleadt

Project.toml

@@ -41,7 +41,7 @@ CEnum = "0.4, 0.5"
 CodecBzip2 = "0.8"
 ExprTools = "0.1"
 GPUArrays = "10.1"
-GPUCompiler = "0.26"
+GPUCompiler = "0.26, 0.27"
 KernelAbstractions = "0.9.1"
 LLVM = "7.2, 8"
 LLVMDowngrader_jll = "0.3"