Modify error test to run with hwasan without error

The sanitizer-aarch64-linux-bootstrap-hwasan
buildbot was failing when running the
llvm/test/CodeGen/SPIRV/opencl/reflect-error.ll
test.

Defining `abort_on_error=0` in the HWASAN_OPTIONS
environment variable should resolve this issue, as
the test purposefully throws an error we intend to
catch.

Author: Icohedron

llvm/test/CodeGen/SPIRV/opencl/reflect-error.ll

@@ -1,5 +1,5 @@
-; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o /dev/null 2>&1 | FileCheck %s
-; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv32-unknown-unknown %s -o /dev/null 2>&1 | FileCheck %s
+; RUN: HWASAN_OPTIONS="abort_on_error=0" not llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o /dev/null 2>&1 | FileCheck %s
+; RUN: HWASAN_OPTIONS="abort_on_error=0" not llc -verify-machineinstrs -O0 -mtriple=spirv32-unknown-unknown %s -o /dev/null 2>&1 | FileCheck %s
 
 ; CHECK: LLVM ERROR: %{{.*}} = G_INTRINSIC intrinsic(@llvm.spv.reflect), %{{.*}}, %{{.*}} is only supported with the GLSL extended instruction set.