Updated st to 0.8.2

Updated to latest git (20190414.f1546cf) & updated patches.

Changes:
. Upstream fixes.
. Alpha: Opacity value is now typed in float (0-1).
  Also "-A" cmd option added as alternative opacity changing method.
. Clipboard: middle click pastes from clipboard.
. Organized shortcuts.

win.h

@@ -23,10 +23,6 @@ enum win_mode {
 	                  |MODE_MOUSEMANY,
 };
 
-/* alpha */
-#define OPAQUE 0Xff
-#define USE_ARGB (alpha != OPAQUE && opt_embed == NULL)
-
 void xbell(void);
 void xclipcopy(void);
 void xdrawcursor(int, int, Glyph, int, int, Glyph);
@@ -40,3 +36,4 @@ void xsetmode(int, unsigned int);
 void xsetpointermotion(int);
 void xsetsel(char *);
 int xstartdraw(void);
+void xximspot(int, int);