Use static libjpeg

Using libjpeg-turbo on Aseprite gives the error “Wrong JPEG library
version: library is 62, caller expects 80.” I’m not sure if there is any
way to use a shared library right now, so I took the easy way out
and just used the static library compiled with Aseprite.

Additionally, I changed the hack for using Python 2 with depot_tools to
something less messy.

.SRCINFO

@@ -1,7 +1,7 @@
 pkgbase = aseprite
 	pkgdesc = Create animated sprites and pixel art
 	pkgver = 1.2.17
-	pkgrel = 1
+	pkgrel = 2
 	url = http://www.aseprite.org/
 	arch = x86_64
 	license = custom
@@ -14,7 +14,6 @@ pkgbase = aseprite
 	depends = giflib
 	depends = zlib
 	depends = libpng
-	depends = libjpeg-turbo
 	depends = tinyxml
 	depends = freetype2
 	depends = harfbuzz