Fix for PECOFF GetArchitecture

0 as CPU subtype never matches anything (at least, it doesn't match x86_64 windows binaries, of which there are correct arch definitions for). It should be created with LLDB_INVALID_CPUTYPE. 

llvm-svn: 195435

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

@@ -922,7 +922,7 @@ ObjectFilePECOFF::GetArchitecture (ArchSpec &arch)
         case llvm::COFF::IMAGE_FILE_MACHINE_ARM:
         case llvm::COFF::IMAGE_FILE_MACHINE_ARMV7:
         case llvm::COFF::IMAGE_FILE_MACHINE_THUMB:
-            arch.SetArchitecture (eArchTypeCOFF, machine, 0);
+            arch.SetArchitecture (eArchTypeCOFF, machine, LLDB_INVALID_CPUTYPE);
             return true;
         default:
             break;