[Hamlib-developer] [Hamlib/Hamlib] 16e55b: Fix grep error on mingw build

[Michael B. <no...@gi...>]

  Branch: refs/heads/Hamlib-4.5.3
  Home:   https://github.com/Hamlib/Hamlib
  Commit: 16e55b604707ec7f0222efb451d3c62f8d1824d9
      https://github.com/Hamlib/Hamlib/commit/16e55b604707ec7f0222efb451d3c62f8d1824d9
  Author: Mike Black W9MDB <mdb...@ya...>
  Date:   2022-12-24 (Sat, 24 Dec 2022)

  Changed paths:
    M src/Makefile.am

  Log Message:
  -----------
  Fix grep error on mingw build