Prepare for V9.0.0 release.

+ Set flash wait states on MSP432 demos.
+ Remove use of obsolete IO library in PIC32 demos.
+ Remove obsolete item left on stack of first task to run in the Cortex-M0 ports.
+ Correct IA32 GCC vPortExitCritical() implementation when configMAX_API_CALL_INTERRUPT_PRIORITY == portMAX_PRIORITY.

FreeRTOS/Source/portable/GCC/ARM_CM0/port.c

@@ -186,8 +186,10 @@ void vPortStartFirstTask( void )
 	"	isb							\n"
 	"	pop {r0-r5}					\n" /* Pop the registers that are saved automatically. */
 	"	mov lr, r5					\n" /* lr is now in r5. */
+	"	pop {r3}					\n" /* Return address is now in r3. */
+	"	pop {r2}					\n" /* Pop and discard XPSR. */
 	"	cpsie i						\n" /* The first task has its context and interrupts can be enabled. */
-	"	pop {pc}					\n" /* Finally, pop the PC to jump to the user defined task code. */
+	"	bx r3						\n" /* Finally, jump to the user defined task code. */
 	"								\n"
 	"	.align 4					\n"
 	"pxCurrentTCBConst2: .word pxCurrentTCB	  "

FreeRTOS/Source/portable/GCC/IA32_flat/port.c

@@ -504,16 +504,16 @@ void vPortExitCritical( void )
 			#else
 			{
 				portAPIC_TASK_PRIORITY = 0;
-
-				/* If a yield was pended from within the critical section then
-				perform the yield now. */
-				if( ulPortYieldPending != pdFALSE )
-				{
-					ulPortYieldPending = pdFALSE;
-					__asm volatile( portYIELD_INTERRUPT );
-				}
 			}
 			#endif
+
+			/* If a yield was pended from within the critical section then
+			perform the yield now. */
+			if( ulPortYieldPending != pdFALSE )
+			{
+				ulPortYieldPending = pdFALSE;
+				__asm volatile( portYIELD_INTERRUPT );
+			}
 		}
 	}
 }