AP_Scripting: Revert "Reduce lua stack usage"

This reverts commit 6e7367b86f.

These reductions reduce the usage of the Lua stack, which is stored in
the heap. This reverts back to the stock Lua values; some complex
scripts may desire extra locals. There is some increased risk of memory
fragmentation and so forth but presumably such scripts are prepared.

The actual C stack depth can be limited by `LUAI_MAXCCALLS`.

libraries/AP_Scripting/lua/src/lfunc.h

@@ -26,7 +26,7 @@
 ** maximum number of upvalues in a closure (both C and Lua). (Value
 ** must fit in a VM register.)
 */
-#define MAXUPVAL	127
+#define MAXUPVAL	255
 
 
 /*

libraries/AP_Scripting/lua/src/lparser.c

@@ -31,7 +31,7 @@
 
 /* maximum number of local variables per function (must be smaller
    than 250, due to the bytecode format) */
-#define MAXVARS		100
+#define MAXVARS		200
 
 
 #define hasmultret(k)		((k) == VCALL || (k) == VVARARG)