Segger Embedded Studio support for NRF5_SDK_12_3_0_d7732ad

• Ses projects added to examples_segger folder.
• Project in "/examples_segger/ble_peripheral/ble_app_template/pca10028/s130/ses_official" directly created at SES (without import keil project).

What has changed?

• Inside "hardfault_handler_gcc.c" file,

// " ldr r1, =__StackTop \n"

// " ldr r2, =__StackLimit \n"

" ldr r1, =stack_end \n"

" ldr r2, =stack_start \n"

Following lines changed as above according to "https://devzone.nordicsemi.com/f/nordic-q-a/23232/hardfault_handler-for-segger-embedded-studio".