In friendly matches, which are not subject to any organizing authority, all markets will be settled based on the actual end result of the game (excluding any overtime), regardless of whether 90 minutes are played.
Only when the friendly match has been changed from two to three halves, then all bets on the match will be canceled.
For further information about betting on friendly matches, you can visit the "Betting Rules" section and check term 3.1.1.