Add --fused command line argument, to override fused game detection

(Designed to make launchers work for 'fake-fused' games, for example
ones you'd easily distribute on linux.)

src/scripts/boot.lua

@@ -112,6 +112,7 @@ end
 
 love.arg.options = {
 	console = { a = 0 },
+	fused = {a = 0 },
 	game = { a = 1 }
 }
 
@@ -206,6 +207,9 @@ function love.boot()
 	-- Is this one of those fancy "fused" games?
 	local can_has_game = pcall(love.filesystem.setSource, arg0)
 	is_fused_game = can_has_game
+	if love.arg.options.fused.set then
+		is_fused_game = true
+	end
 
 	if not can_has_game and o.game.set and o.game.arg[1] then
 		local full_source =  love.path.getfull(o.game.arg[1])

src/scripts/boot.lua.h

@@ -207,6 +207,7 @@ const unsigned char boot_lua[] =
 	0x20, 0x7b, 0x0a,
 	0x09, 0x63, 0x6f, 0x6e, 0x73, 0x6f, 0x6c, 0x65, 0x20, 0x3d, 0x20, 0x7b, 0x20, 0x61, 0x20, 0x3d, 0x20, 0x30, 
 	0x20, 0x7d, 0x2c, 0x0a,
+	0x09, 0x66, 0x75, 0x73, 0x65, 0x64, 0x20, 0x3d, 0x20, 0x7b, 0x61, 0x20, 0x3d, 0x20, 0x30, 0x20, 0x7d, 0x2c, 0x0a,
 	0x09, 0x67, 0x61, 0x6d, 0x65, 0x20, 0x3d, 0x20, 0x7b, 0x20, 0x61, 0x20, 0x3d, 0x20, 0x31, 0x20, 0x7d, 0x0a,
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@@ -345,7 +346,12 @@ const unsigned char boot_lua[] =
 	0x65, 0x73, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x2e, 0x73, 0x65, 0x74, 0x53, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x2c, 
 	0x20, 0x61, 0x72, 0x67, 0x30, 0x29, 0x0a,
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-	0x61, 0x6e, 0x5f, 0x68, 0x61, 0x73, 0x5f, 0x67, 0x61, 0x6d, 0x65, 0x0a,0x0a,
+	0x61, 0x6e, 0x5f, 0x68, 0x61, 0x73, 0x5f, 0x67, 0x61, 0x6d, 0x65, 0x0a,
+	0x09, 0x69, 0x66, 0x20, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x61, 0x72, 0x67, 0x2e, 0x6f, 0x70, 0x74, 0x69, 0x6f, 
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+	0x74, 0x72, 0x75, 0x65, 0x0a,
+	0x09, 0x65, 0x6e, 0x64, 0x0a,0x0a,
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