Update constant-island-entry.s

Author: Asher8118

bolt/test/AArch64/constant-island-entry.s

@@ -1,7 +1,7 @@
 // This test checks that we ignore functions which add an entry point that
 // is in a costant island.
 
-# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-linux-gnu %s -o %t.o
+# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown %s -o %t.o
 # RUN: %clang %cflags %t.o -pie -Wl,-q -o %t.exe
 # RUN: llvm-bolt %t.exe -o %t.bolt 2>&1 | FileCheck %s