[ruby-cvs:78316] b563439274 (master): Show include directive differences only when under git

Nobuyoshi Nakada	2019-11-23 16:00:39 +0900 (Sat, 23 Nov 2019)

  New Revision: b563439274

  https://github.com/ruby/ruby/commit/b563439274

  Log:
    Show include directive differences only when under git
    
    When building from tarballs, the source directory is not a git
    repository.

  Modified files:
    common.mk