libjava should load shell32.dll eagerly

Java.dll is delay-loading shell32.dll. Delay-loading should only be used on libraries that might never be used, to avoid loading them when they are not needed.

Java.dll is using the following 2 imports from shell32.dll:
- SHGetKnownFolderPath
- SHGetFolderPathW

These functions are used by getHomeFromShell32, which is always used to populate user.home property early during startup.

A bit of archeology:
- Delay-loading was introduced in JDK-7030249. When it was implemented, user.home was populated with values taken from the Windows registry, and getHomeFromShell32 was only called if the registry-based method failed.
- Since JDK-6519127, we are always using getHomeFromShell32 to retrieve user.home. We are still delay-loading shell32, and using try/except to handle missing imports on older shell32 versions (Win2000/XP/2003)

The imports are guaranteed to be available on anything more recent than Vista, and we no longer support any of the older Windows versions.