PowerUp: Allocate enough space for TOKEN_GROUPS
PowerUp: Allocate enough space for TOKEN_GROUPS

Make an initial call to GetTokenInformation() with a NULL buffer to get
the actual buffer size required. Prevents "The data area passed to a system
call is too small" error being thrown.

api0cradle/PowerSploit,api0cradle/PowerSploit,mattifestation/PowerSploit,mattifestation/PowerSploit