debugger: fixed test

Author: cmaglie

commands/debug/testdata/custom_hardware/arduino-test/samd/platform.txt

@@ -124,6 +124,7 @@ debug.toolchain.path={runtime.tools.arm-none-eabi-gcc-7-2017q4.path}/bin/
 debug.toolchain.prefix=arm-none-eabi-
 debug.server=openocd
 debug.server.openocd.path={runtime.tools.openocd-0.10.0-arduino7.path}/bin/openocd
+debug.server.openocd.path.windows={runtime.tools.openocd-0.10.0-arduino7.path}/bin/openocd.exe
 debug.server.openocd.scripts_dir={runtime.tools.openocd-0.10.0-arduino7.path}/share/openocd/scripts/
 debug.server.openocd.script={runtime.platform.path}/variants/{build.variant}/{build.openocdscript}