Revert "[compiler-rt][HWAsan] Remove CHECK lines from test"

This reverts commit 9f5811e.

It looks like this caused some test failures:
1. https://lab.llvm.org/buildbot/#/builders/51/builds/26529
2. https://lab.llvm.org/buildbot/#/builders/198/builds/9462

Author: boomanaiden154

compiler-rt/test/hwasan/TestCases/Linux/fixed-shadow.c

@@ -3,12 +3,12 @@
 // Default compiler instrumentation works with any shadow base (dynamic or fixed).
 // RUN: %clang_hwasan %s -o %t
 // RUN: %run %t
-// RUN: env HWASAN_OPTIONS=fixed_shadow_base=263878495698944 %run %t
+// RUN: env HWASAN_OPTIONS=fixed_shadow_base=263878495698944 %run %t 2>%t.out || (cat %t.out | FileCheck %s)
 // RUN: env HWASAN_OPTIONS=fixed_shadow_base=4398046511104 %run %t
 //
 // If -hwasan-mapping-offset is set, then the fixed_shadow_base needs to match.
 // RUN: %clang_hwasan %s -mllvm -hwasan-mapping-offset=263878495698944 -o %t
-// RUN: env HWASAN_OPTIONS=fixed_shadow_base=263878495698944 %run %t
+// RUN: env HWASAN_OPTIONS=fixed_shadow_base=263878495698944 %run %t 2>%t.out || (cat %t.out | FileCheck %s)
 // RUN: env HWASAN_OPTIONS=fixed_shadow_base=4398046511104 not %run %t
 
 // RUN: %clang_hwasan %s -mllvm -hwasan-mapping-offset=4398046511104 -o %t
@@ -26,6 +26,8 @@
 //
 // UNSUPPORTED: android
 
+// CHECK: FATAL: HWAddressSanitizer: Shadow range {{.*}} is not available
+
 #include <assert.h>
 #include <sanitizer/allocator_interface.h>
 #include <sanitizer/hwasan_interface.h>