Preheat oven to 425 degrees F (220 degrees C). Melt butter in saucepan over medium heat. Stir in white sugar, brown sugar, salt, cinnamon, and water. Bring the syrup to a boil, stirring constantly to dissolve sugar, then remove from heat. Unroll pie crusts, press one into a 9-inch pie dish, and place the apples into the crust. Unroll the second crust on a work surface, and cut into about 8 1-inch wide strips.