Fix gdbscript
# $ JLinkGDBServer -if SWD -device ATSAMD51J20 -speed 4000 -ir
# See I/O using telnet:
# $ telnet localhost 2333
-file ../../build/bin/firmware-semihosting.elf
+file ../../build-semihosting/bin/firmware.elf
target remote :2331
monitor semihosting enable
monitor reset
