Move Host::GetArchitecture to HostInfo::GetArchitecture.

As a side effect, this patch also eliminates all of the
preprocessor conditionals previously used to implement
GetArchitecture().

llvm-svn: 216074
diff --git a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
index d5f2753..a1b674e 100644
--- a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.cpp
@@ -17,6 +17,7 @@
 #include "lldb/Core/Log.h"
 #include "lldb/Core/State.h"
 #include "lldb/Host/Host.h"
+#include "lldb/Host/HostInfo.h"
 #include "lldb/lldb-enumerations.h"
 #include "lldb/lldb-private-log.h"
 #include "Plugins/Process/Utility/RegisterContextLinux_i386.h"
@@ -129,14 +130,15 @@
             {
             case llvm::Triple::x86:
             case llvm::Triple::x86_64:
-                if (Host::GetArchitecture().GetAddressByteSize() == 4)
+                if (HostInfo::GetArchitecture().GetAddressByteSize() == 4)
                 {
                     // 32-bit hosts run with a RegisterContextLinux_i386 context.
                     reg_interface = static_cast<RegisterInfoInterface*>(new RegisterContextLinux_i386(target_arch));
                 }
                 else
                 {
-                    assert((Host::GetArchitecture ().GetAddressByteSize () == 8) && "Register setting path assumes this is a 64-bit host");
+                    assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) &&
+                           "Register setting path assumes this is a 64-bit host");
                     // X86_64 hosts know how to work with 64-bit and 32-bit EXEs using the x86_64 register context.
                     reg_interface = static_cast<RegisterInfoInterface*> (new RegisterContextLinux_x86_64 (target_arch));
                 }