scudo: Fix one of the C wrapper tests on Android.

[pcc]

Summary

The test ScudoWrappersCTest.Realloc expects realloc of memalign to work on
Android, but this relies on dealloc_type_mismatch being set to false. Commit
0d3d4d3b0 caused us to start setting it to true in the C wrapper tests,
which broke the test. Set it to the correct value on Android.

[merge_guards_bot]

Build result: pass - 60520 tests passed, 0 failed and 726 were skipped.

Log files: console-log.txt, CMakeCache.txt

compiler-rt/lib/scudo/standalone/tests/scudo_unit_test_main.cpp

 //===-- scudo_unit_test_main.cpp --------------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "tests/scudo_unit_test.h"
 
+// Match Android's default configuration, which disables Scudo's mismatch
+// allocation check, as it is being triggered by some third party code.
+#if SCUDO_ANDROID
+#define DEALLOC_TYPE_MISMATCH "false"
+#else
+#define DEALLOC_TYPE_MISMATCH "true"
+#endif
+
 // This allows us to turn on/off a Quarantine for specific tests. The Quarantine
 // parameters are on the low end, to avoid having to loop excessively in some
 // tests.
 bool UseQuarantine = true;
 extern "C" __attribute__((visibility("default"))) const char *
 __scudo_default_options() {
   if (!UseQuarantine)
-    return "dealloc_type_mismatch=true";
+    return "dealloc_type_mismatch=" DEALLOC_TYPE_MISMATCH;
   return "quarantine_size_kb=256:thread_local_quarantine_size_kb=128:"
-         "quarantine_max_chunk_size=512:dealloc_type_mismatch=true";
+         "quarantine_max_chunk_size=512:"
+         "dealloc_type_mismatch=" DEALLOC_TYPE_MISMATCH;
 }
 
 int main(int argc, char **argv) {
 #if !SCUDO_FUCHSIA
   testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
 #else
   return RUN_ALL_TESTS(argc, argv);
 #endif
 }