Allow for sig chain to be disabled.

Tools like dex2oat or patchoat don't need the sig chain or the fault
manager. This also enables building a statically link version of
dex2oat.

Change-Id: I9897728cac48acade854bb027bfde860628ebf84
diff --git a/patchoat/patchoat.cc b/patchoat/patchoat.cc
index 0401727..3a155be 100644
--- a/patchoat/patchoat.cc
+++ b/patchoat/patchoat.cc
@@ -138,6 +138,7 @@
   std::string img = "-Ximage:" + image_location;
   options.push_back(std::make_pair(img.c_str(), nullptr));
   options.push_back(std::make_pair("imageinstructionset", reinterpret_cast<const void*>(isa_name)));
+  options.push_back(std::make_pair("-Xno-sig-chain", nullptr));
   if (!Runtime::Create(options, false)) {
     LOG(ERROR) << "Unable to initialize runtime";
     return false;
@@ -233,6 +234,7 @@
   std::string img = "-Ximage:" + image_location;
   options.push_back(std::make_pair(img.c_str(), nullptr));
   options.push_back(std::make_pair("imageinstructionset", reinterpret_cast<const void*>(isa_name)));
+  options.push_back(std::make_pair("-Xno-sig-chain", nullptr));
   if (!Runtime::Create(options, false)) {
     LOG(ERROR) << "Unable to initialize runtime";
     return false;