migrate SWIRL effect to external file

src/fx/fx.hgr.precomputed.1bit.a

@@ -230,6 +230,7 @@ InitOnce
          dec   $ef
          bpl   ---
          bmi   +++                   ; always branches
+aslmod4  jsr   aslmod
 aslmod3  jsr   aslmod
 aslmod2  jsr   aslmod
 aslmod   cmp   #$1A

src/fx/fx.hgr.swirl.a

@@ -1,17 +1,17 @@
 ;license:MIT
-;(c) 2019 by 4am
+;(c) 2019-2020 by 4am/qkumba
 ;
 !cpu 6502
 !to "build/FX/SWIRL",plain
 *=$6000
 
          !source "src/fx/fx.hgr.precomputed.1bit.a"
-         !source "src/fx/fx.hgr.radial.common.a"
 
-!if * and 1 {
-         !byte 0
-}
-Coordinates
-         !source "src/fx/fx.hgr.swirl.data.a"
-EndCoordinates
-         !byte $80
+         +FX_INITONCE_1BIT CoordinatesFile, Start
+         +FX_RIPPLE_1BIT aslmod4
+Start
+         +FX_PRECOMPUTED_1BIT Coordinates1Bit
+
+CoordinatesFile
+         !byte 15
+         !text "FX/CORNER4.DATA"