OSArchitecture of Windows7 Japanese doesn't return a value '64-bit'.

"package should be_installed" doesn't work correctly on Windows 64bit _Japanese_ OS.

"(Get-WmiObject win32_operatingsystem).OSArchitecture" on Windows 7 64bit Japanese returns "64 ビット".
It causes serversepc on Windows 64bit doesn't look at an appropriate registry,
when testing package should be_installed.

Windows 7 64bit Japanese shows:
PS C:\tmp> (Get-WmiObject win32_operatingsystem).OSArchitecture
64 ビット

On the other hand, I check Windows 7 64bit English and Windows 7 64bit arabic.
They return a value as "64-bit".

But I don't know what value the other languages return, so I modify it to check only '64'.
It's not a good modification. I hope someone improves it.