patch to use Lua 5.2 instead of Lua 5.1.

Need testing before contribution to upstream.

XXX file upstream bug

--- libpeas-1.14.0/loaders/lua5.2/resources/peas-lua-compile.lua 2015-06-25 23:41:37.616161175 -0700

+++ libpeas-1.14.0/loaders/lua5.2/resources/peas-lua-compile.lua 2015-06-25 23:41:18.975741723 -0700

@@ -38,8 +38,8 @@

check(err, 'Failed to open file "%s"', filename)

-- Error includes the filename

- local compiled, err = loadstring(input_file:read('*a'),

- '@' .. filename)

+ local compiled, err = load(input_file:read('*a'),

+ '@' .. filename)

check(err, 'Invalid Lua file')

local f, err = io.open(output, 'wb')