Add the ability to defer the initialization of the SyzyAsan crash reporter.

syzygy/agent/asan/rtl_impl.cc

Index: syzygy/agent/asan/rtl_impl.cc
diff --git a/syzygy/agent/asan/rtl_impl.cc b/syzygy/agent/asan/rtl_impl.cc
index 807eef9d7a0b9aa0d522a4aad4ee55c99fb68330..02043e49032e86b75c517a56fe06380e3db86fec 100644
--- a/syzygy/agent/asan/rtl_impl.cc
+++ b/syzygy/agent/asan/rtl_impl.cc
@@ -259,4 +259,8 @@ int asan_CrashForException(EXCEPTION_POINTERS* exception) {
   return agent::asan::AsanRuntime::CrashForException(exception);
 }
 
+void WINAPI asan_ReinitializeCrashHandler() {
+  asan_runtime->InitializeCrashReporter();
+}
+
 }  // extern "C"