[test] Fix -fbasic-block-sections= test on Windows after D89500

Author: MaskRay

clang/test/CodeGen/basic-block-sections.c

@@ -39,4 +39,4 @@ int another(int a) {
 //
 // UNIQUE: .section .text.world.world.1,
 // UNIQUE: .section .text.another.another.1,
-// ERROR: error:  unable to load basic block sections function list: 'No such file or directory'
+// ERROR: error:  unable to load basic block sections function list: '{{[Nn]}}o such file or directory'