Optimize esptool path for packaging and fix possible build errors in windows

Author: blue-2357

platform.txt

@@ -3,8 +3,8 @@ version=0.0.1
 
 runtime.tools.xtensa-esp32-elf-gcc.path={runtime.platform.path}/tools/xtensa-esp32-elf
 
-tools.esptool.path="{runtime.platform.path}/tools/esptool"
-tools.esptool.cmd={tools.esptool.path}
+tools.esptool.path={runtime.platform.path}/tools/esptool
+tools.esptool.cmd="{tools.esptool.path}"
 tools.esptool.cmd.linux=python "{tools.esptool.path}.py"
 tools.esptool.cmd.windows="{tools.esptool.path}.exe"