[packager] Bit Architecture check fails on windows with system JRE and 64bit JVM

When running a javapackager on a 64 bit JVM with a System Runtime requested the bit architecture detection logic fails and presumes the system JRE is 32 bits. Actually we don't know what the system JRE is because the user provides it at install time.

Because of this we need to add another condition to not fail the bit archteicture checks if we are bundling for a system jre.