Replaced asm statements with __asm for building with CrossWorks V2.

Source/portable/GCC/ARM_CM3/port.c

@@ -128,7 +128,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
 
 void vPortSVCHandler( void )
 {
-	asm volatile (
+	__asm volatile (
 					"	ldr	r3, pxCurrentTCBConst2		\n" /* Restore the context. */
 					"	ldr r1, [r3]					\n" /* Use pxCurrentTCBConst to get the pxCurrentTCB address. */
 					"	ldr r0, [r1]					\n" /* The first item in pxCurrentTCB is the task top of stack. */
@@ -147,7 +147,7 @@ void vPortSVCHandler( void )
 
 void vPortStartFirstTask( void )
 {
-	asm volatile(
+	__asm volatile(
 					" ldr r0, =0xE000ED08 	\n" /* Use the NVIC offset register to locate the stack. */
 					" ldr r0, [r0] 			\n"
 					" ldr r0, [r0] 			\n"