[RK3128][Android 6.0] OTA編譯錯誤

使用make otapackage命令編譯ota包時出現以下錯誤：

Package target files: out/target/product/rk312x/obj/PACKAGING/target_files_intermediates/rk312x-target_files-user.wintec.20180130.164651.zip
building image from target_files RECOVERY...
Traceback (most recent call last):
  File "./build/tools/releasetools/make_recovery_patch", line 66, in <module>
    main(sys.argv[1:])
  File "./build/tools/releasetools/make_recovery_patch", line 39, in main
    input_dir, "RECOVERY")
  File "/home/wintec/work/idt500_6.0_1102/build/tools/releasetools/common.py", line 448, in GetBootableImage
    info_dict)
  File "/home/wintec/work/idt500_6.0_1102/build/tools/releasetools/common.py", line 383, in BuildBootableImage
    p4 = Run(sign_cmd)
  File "/home/wintec/work/idt500_6.0_1102/build/tools/releasetools/common.py", line 83, in Run
    return subprocess.Popen(args, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1343, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
build/core/Makefile:1471: recipe for target 'out/target/product/rk312x/obj/PACKAGING/target_files_intermediates/rk312x-target_files-user.wintec.20180130.164651.zip' failed
make: *** [out/target/product/rk312x/obj/PACKAGING/target_files_intermediates/rk312x-target_files-user.wintec.20180130.164651.zip] Error 1

解決辦法：cd build/tools/drmsigntool/， mm -B，再回到根目錄下make otapackage。