How to compile sampleapp in APPS Image?

1. Copy the sampleapp folder to qtee_tas/apps/securemsm/trustzone/qsapps
2. For compiling sampleapp in APPS build use build command from TZ APPS ROOT directory:
   python3 /pkg/ssg/scons/script/scons -C qtee_tas/apps/securemsm/trustzone/qsapps/sampleapp/src/ -f SConscript BUILD_ROOT=`pwd` SDK_VARIANT=external CHIPSET=[CHIPSET VALUE] sampleapp ARCH=[Architecture for which sampleapp is to be built]
   Possible options for ARCH - aarch32(32bit) or aarch64(64bit)
   Possible options for SDK_VARIANT - internal or external. For customer builds to be
   set as external.

