samples: philosophers: reduce stack size used

% TASK NAME        PRIO ENTRY           STACK GROUPS

% ==================================================

  TASK philTask      5 philDemo         1024 [EXE]

  TASK phi1Task0     6 philEntry        1024 [PHI]

  TASK philTask1     6 philEntry        1024 [PHI]

  TASK philTask2     6 philEntry        1024 [PHI]

  TASK philTask3     6 philEntry        1024 [PHI]

  TASK philTask4     6 philEntry        1024 [PHI]

  TASK philTask5     6 philEntry        1024 [PHI]

  TASK philTask      5 philDemo         512 [EXE]

  TASK phi1Task0     6 philEntry        256 [PHI]

  TASK philTask1     6 philEntry        256 [PHI]

  TASK philTask2     6 philEntry        256 [PHI]

  TASK philTask3     6 philEntry        256 [PHI]

  TASK philTask4     6 philEntry        256 [PHI]

  TASK philTask5     6 philEntry        256 [PHI]

% MUTEX NAME

% ================

	"of differing priorities and the %s semaphores and timers."

#ifdef CONFIG_NANOKERNEL

#define STSIZE 1024

#define STSIZE 512

/* externs */