[BACKPORT] Merged in dagar/nuttx/pr-stm32f7_stackcheck-upstream (pull…

… request #714)

stm32f7 add up_stackcheck.c

Approved-by: GregoryN <gnutt@nuttx.org>

arch/arm/src/stm32f7/Make.defs

@@ -54,6 +54,10 @@ CMN_CSRCS += up_releasestack.c up_reprioritizertr.c up_schedulesigaction.c
 CMN_CSRCS += up_sigdeliver.c up_stackframe.c up_systemreset.c up_unblocktask.c up_usestack.c
 CMN_CSRCS += up_doirq.c up_hardfault.c up_svcall.c up_vfork.c
 
+ifeq ($(CONFIG_ARMV7M_STACKCHECK),y)
+CMN_CSRCS += up_stackcheck.c
+endif
+
 # Configuration-dependent common files
 
 ifeq ($(CONFIG_ARMV7M_CMNVECTOR),y)