[AARCH64] Enable AARCH64 lit tests on windows dev machines

As discussed on PR27654, this patch fixes the triples of a lot of aarch64 tests and enables lit tests on windows

This will hopefully help stop cases where windows developers break the aarch64 target

Differential Revision: https://reviews.llvm.org/D22191

llvm-svn: 275973
diff --git a/llvm/test/CodeGen/AArch64/arm64-dup.ll b/llvm/test/CodeGen/AArch64/arm64-dup.ll
index c6b7de3..28df305 100644
--- a/llvm/test/CodeGen/AArch64/arm64-dup.ll
+++ b/llvm/test/CodeGen/AArch64/arm64-dup.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=arm64 -aarch64-neon-syntax=apple -asm-verbose=false | FileCheck %s
+; RUN: llc < %s -mtriple=arm64-eabi -aarch64-neon-syntax=apple -asm-verbose=false | FileCheck %s
 
 define <8 x i8> @v_dup8(i8 %A) nounwind {
 ;CHECK-LABEL: v_dup8: