fix get cmdline error
fix get cmdline error

cfig/Nexus_boot_image_editor,cfig/Android_boot_image_editor,cfig/Android_boot_image_editor,cfig/Android_boot_image_editor,cfig/Android_boot_image_editor,cfig/Nexus_boot_image_editor,cfig/Android_boot_image_editor,cfig/Nexus_boot_image_editor,cfig/Nexus_boot_image_editor,cfig/Android_boot_image_editor