Commit 3fe92e63f5 ("lua: look for lua5.4 modules under /usr instead of
/usr/local") changed LUA_ROOT to /usr/, moving the default Lua 5.4
module search paths out of /usr/local. lua-eco still installed its Lua
and native modules under /usr/local/lib/lua/5.4, so require() could no
longer find them with the default search paths.
Install modules from the main package and all subpackages under
/usr/lib/lua/5.4, which is searched for both .lua and .so files.
Define LUA_INSTALL_DIR once and use it throughout the install rules so
future directory changes only need one update. Bump PKG_RELEASE to 2
so the corrected packages are offered as upgrades.
Fixes: 3fe92e63f5 ("lua: look for lua5.4 modules under /usr instead of /usr/local")
Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>