saveHex: rename recipe.hex -> recipe.output

Signed-off-by: Arnav Gupta <championswimmer@gmail.com>

Author: championswimmer

platform.txt

@@ -72,8 +72,8 @@ recipe.objcopy.eep.pattern="{compiler.path}{compiler.objcopy.cmd}" {compiler.obj
 recipe.objcopy.hex.pattern="{compiler.path}{compiler.elf2hex.cmd}" {compiler.elf2hex.flags} {compiler.elf2hex.extra_flags} "{build.path}/{build.project_name}.elf" "{build.path}/{build.project_name}.hex"
 
 ## Save hex
-recipe.hex.tmp_file={build.project_name}.hex
-recipe.hex.save_file={build.project_name}.{build.variant}.hex
+recipe.output.tmp_file={build.project_name}.hex
+recipe.output.save_file={build.project_name}.{build.variant}.hex
 
 ## Compute size
 recipe.size.pattern="{compiler.path}{compiler.size.cmd}" -A "{build.path}/{build.project_name}.elf"