hack(build_image): remove reference to ecgtest

hw-tests/bmatest/build_image

 name=$(basename `pwd`)
 ninja -C ../../build -t clean hw-tests/$name/$name.elf
-ninja -C ../../build hw-tests/$name/ecgtest.elf
+ninja -C ../../build hw-tests/$name/$name.elf
 arm-none-eabi-objcopy -O binary ../../build/hw-tests/$name/$name.elf ../../build/hw-tests/$name/$name.bin
 cp ../../build/hw-tests/$name/$name.bin card10.bin
 ../../bootloader/crc_patch.py card10.bin

hw-tests/bmetest/build_image

 name=$(basename `pwd`)
 ninja -C ../../build -t clean hw-tests/$name/$name.elf
-ninja -C ../../build hw-tests/$name/ecgtest.elf
+ninja -C ../../build hw-tests/$name/$name.elf
 arm-none-eabi-objcopy -O binary ../../build/hw-tests/$name/$name.elf ../../build/hw-tests/$name/$name.bin
 cp ../../build/hw-tests/$name/$name.bin card10.bin
 ../../bootloader/crc_patch.py card10.bin

hw-tests/ecgtest/build_image

 name=$(basename `pwd`)
 ninja -C ../../build -t clean hw-tests/$name/$name.elf
-ninja -C ../../build hw-tests/$name/ecgtest.elf
+ninja -C ../../build hw-tests/$name/$name.elf
 arm-none-eabi-objcopy -O binary ../../build/hw-tests/$name/$name.elf ../../build/hw-tests/$name/$name.bin
 cp ../../build/hw-tests/$name/$name.bin card10.bin
 ../../bootloader/crc_patch.py card10.bin

hw-tests/hello-world/build_image

 name=$(basename `pwd`)
 ninja -C ../../build -t clean hw-tests/$name/$name.elf
-ninja -C ../../build hw-tests/$name/ecgtest.elf
+ninja -C ../../build hw-tests/$name/$name.elf
 arm-none-eabi-objcopy -O binary ../../build/hw-tests/$name/$name.elf ../../build/hw-tests/$name/$name.bin
 cp ../../build/hw-tests/$name/$name.bin card10.bin
 ../../bootloader/crc_patch.py card10.bin

hw-tests/imutest/build_image

 name=$(basename `pwd`)
 ninja -C ../../build -t clean hw-tests/$name/$name.elf
-ninja -C ../../build hw-tests/$name/ecgtest.elf
+ninja -C ../../build hw-tests/$name/$name.elf
 arm-none-eabi-objcopy -O binary ../../build/hw-tests/$name/$name.elf ../../build/hw-tests/$name/$name.bin
 cp ../../build/hw-tests/$name/$name.bin card10.bin
 ../../bootloader/crc_patch.py card10.bin

hw-tests/ips/build_image

 name=$(basename `pwd`)
 ninja -C ../../build -t clean hw-tests/$name/$name.elf
-ninja -C ../../build hw-tests/$name/ecgtest.elf
+ninja -C ../../build hw-tests/$name/$name.elf
 arm-none-eabi-objcopy -O binary ../../build/hw-tests/$name/$name.elf ../../build/hw-tests/$name/$name.bin
 cp ../../build/hw-tests/$name/$name.bin card10.bin
 ../../bootloader/crc_patch.py card10.bin