Add missing #includes required to reference non-kernel APIs

Several files were not explicitly including APIs that they reference,
which could eventually lead to trouble.

Change-Id: Ib33cadfa658280df3fcb4c670463d41b63097b31
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>

include/arch/arm/CortexM/exc.h

@@ -41,6 +41,8 @@ ARM-specific nanokernel exception handling interface. Included by ARM/arch.h.
 #ifdef _ASMLANGUAGE
 GTEXT(_ExcExit);
 #else
+#include <stdint.h>
+
 struct __esf {
 	uint32_t a1; /* r0 */
 	uint32_t a2; /* r1 */

kernel/microkernel/k_mbox.c

@@ -38,6 +38,7 @@
 #include <minik.h>
 
 #include <misc/__assert.h>
+#include <misc/util.h>
 
 /*******************************************************************************
 *

kernel/microkernel/k_pipe.c

@@ -33,6 +33,7 @@
 #include <minik.h>
 #include <k_pipe_buffer.h>
 #include <k_pipe_util.h>
+#include <misc/util.h>
 
 /*******************************************************************************
 *

kernel/microkernel/k_pipe_xfer.c

@@ -36,6 +36,7 @@
 #include <toolchain.h>
 #include <sections.h>
 #include <misc/__assert.h>
+#include <misc/util.h>
 
 #define FORCE_XFER_ON_STALL
 

samples/microkernel/benchmark/app_kernel/src/master.h

@@ -43,6 +43,8 @@
 
 #include <string.h>
 
+#include <misc/util.h>
+
 /* uncomment the define below to use floating point arithmetic */
 /* #define FLOAT */