Reland "[compiler-rt] Fix tests after 03b84e4"

This reverts commit d6be927.

Author: jkorous-apple

compiler-rt/test/asan/TestCases/default_blacklist.cc

@@ -4,4 +4,4 @@
 //
 // Test that ASan uses the default blacklist from resource directory.
 // RUN: %clangxx_asan -### %s 2>&1 | FileCheck %s
-// CHECK: fsanitize-blacklist={{.*}}asan_blacklist.txt
+// CHECK: fsanitize-system-blacklist={{.*}}asan_blacklist.txt

compiler-rt/test/msan/default_blacklist.cc

@@ -1,3 +1,3 @@
 // Test that MSan uses the default blacklist from resource directory.
 // RUN: %clangxx_msan -### %s 2>&1 | FileCheck %s
-// CHECK: fsanitize-blacklist={{.*}}msan_blacklist.txt
+// CHECK: fsanitize-system-blacklist={{.*}}msan_blacklist.txt