Log Message:
Update to 1.5.1J

* Fix PR pkg/51738 from Oshima-san

Changelog:
* Changes in opensource COBOL 1.5.1J

** Bug fixes

*** build error on Windows.

*** test failure caused by missing inline-function declarations on gcc5.

*** compiler warnings on v1.3 or later.

** Changes

*** update solution file in Visual Studio to 2015.

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* Changes in opensource COBOL 1.5.0J

** New features

*** ADD new functions and features.
    (1) Add a new function "C$CALLEDBY".
        This gets the program name that called itself.
    (2) Add a new function "C$LIST-DIRECTORY".
        This gets the list of files in the target directory.
    (3) Add a new feature "CANCEL ALL".
        This cancel subprogram and all subprograms that callded by it.