[lldb] [PECOFF] Only use PECallFrameInfo on the one supported architecture

The RuntimeFunction struct, which PECallFrameInfo interprets, has a
different layout and differnet semantics on all architectures.

Differential Revision: https://reviews.llvm.org/D77000

(cherry picked from commit aa786b8)

Author: mstorsjo

lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp

@@ -780,6 +780,9 @@ std::unique_ptr<CallFrameInfo> ObjectFilePECOFF::CreateCallFrameInfo() {
   if (!data_dir_exception.vmaddr)
     return {};
 
+  if (m_coff_header.machine != llvm::COFF::IMAGE_FILE_MACHINE_AMD64)
+    return {};
+
   return std::make_unique<PECallFrameInfo>(*this, data_dir_exception.vmaddr,
                                            data_dir_exception.vmsize);
 }