Added support for Win 7 Embedded

[rtfmkiesel]

My systeminfo output was not recognized:

...
OS Name:                   Microsoft Windows Embedded Standard 
OS Version:                6.1.7601 Service Pack 1 Build 7601
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
...
System Type:               X86-based PC
...

It is clearly Windows 7 Embedded 32bit. I adjusted the regex and the if statement.

Edit: There are more versions than "standard". I do not have systeminfo output files from those. So for now, this will only work for "standard". I'll see if I can find ISOs for all versions. Also there would be 8/8.1 Embedded which would also need to be matched onto 8/8.1.