Add Adobe Flash's SWF file (the uncompressed variant)

Reference: http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/swf/pdf/swf-file-format-spec.pdf Chapter 2 "The SWF header"

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>

src/binwalk/magic/misc

@@ -79,3 +79,9 @@
 
 0       string      \x00\x53\x46\x48                                    OSX DMG image
 >0x38   string      !d\x00i\x00s\x00k\x00\x20\x00i\x00m\x00a\x00g\x00e  invalid{invalid)
+
+0   string      FWS                 Uncompressed Adobe Flash SWF file,
+>3  byte        0                   {invalid}
+>3  byte        x                   Version %d,
+>4  ulelong     0                   {invalid}
+>4  ulelong     x                   File size (header included) %d