[LTO] Change test/tools/lto/no-bitcode.s requirement from arm to aarch64

Set the test to properly require aarch64 instead of arm. Otherwise, this test fails with LLVM_TARGETS_TO_BUILD='ARM;X86'

bin/llvm-mc: : error: unable to get target for 'arm64-apple-ios7.0.0'

Committed on behalf of @easyaspi314 (Devin)

Differential Revision: https://reviews.llvm.org/D56472

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351560 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/tools/lto/no-bitcode.s b/test/tools/lto/no-bitcode.s
index 2672d2f..8fb8e3b 100644
--- a/test/tools/lto/no-bitcode.s
+++ b/test/tools/lto/no-bitcode.s
@@ -1,4 +1,4 @@
-; REQUIRES: arm-registered-target
+; REQUIRES: aarch64-registered-target
 ; libLTO.dylib shouldn't assert on invalid inputs.
 ; RUN: llvm-mc -triple=arm64-apple-ios7.0.0 -filetype=obj -o %t.o
 ; RUN: llvm-ar r %t.a %t.o