lua fix mem_read_write, strtol

back when I wrote this I was running the sim on a 32 bit machine
I didn't catch the hardcoded LONG_MAX reference or the fact that
lua_tointeger maxes ot at 32 bits

on 64 bit machines strtol caused all kinds of issues especially since
it returned the real LONG_MIN/MAX values

Change-Id: I3571ebbd9df333f7cbf4077562412c27429bfadc

apps/plugins/lua/strtol.c

@@ -2,7 +2,7 @@
 
 extern unsigned long int strtoul(const char *ptr, char **endptr, int base);
 
-#define ABS_LONG_MIN 2147483648UL
+#define ABS_LONG_MIN LONG_MAX
 long int strtol(const char *nptr, char **endptr, int base)
 {
   int neg=0;