Lua: Further centralize code, fix Bizhawk 2.9 (#1685)

* Fixes the socket library for bizhawk 2.9/lua 5.4 by including another one in parallel
* Fixes lua 5.4 support by making socket.lua into a "modern" module (the `module` keyword is gone)
* Adds the linux version and 32 bit windows socket dlls because why not
* Merges common functions into `common.lua` - the only functional change of this should be that:
  * Some things that were locals are globals now - this can be changed, I just was lazy and it likely doesn't matter
  * `drawText` now uses middle/bottom for all prints - feel free to do what you like with that change

data/lua/lua_5_3_compat.lua

@@ -0,0 +1,12 @@
+function bit.rshift(a, b)
+  return a >> b
+end
+function bit.lshift(a, b)
+  return a << b
+end
+function bit.bor(a, b)
+  return a | b
+end
+function bit.band(a, b)
+  return a & b
+end