Adjust installation location to /usr

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/src/luaconf.h
===================================================================
--- a/src/luaconf.h
+++ b/src/luaconf.h
@@ -22,9 +22,9 @@
 #define LUA_CPATH_DEFAULT \
   ".\\?.dll;" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
 #else
-#define LUA_ROOT	"/usr/local/"
-#define LUA_LDIR	LUA_ROOT "share/lua/5.1/"
-#define LUA_CDIR	LUA_ROOT "lib/lua/5.1/"
+#define LUA_ROOT	"/usr/"
+#define LUA_LDIR	LUA_ROOT "share/lua/"
+#define LUA_CDIR	LUA_ROOT "lib/lua/"
 #ifdef LUA_XROOT
 #define LUA_JDIR	LUA_XROOT "share/luajit-2.0.0-beta10/"
 #define LUA_XPATH \