configure: Use m4_esyscmd_s to suppress linefeed (fix needed for macOS) (#1401)
configure: Use m4_esyscmd_s to suppress linefeed (fix needed for macOS) (#1401)

While "echo -n" works on Debian GNU Linux, it fails to produce a valid
configure file on macOS, so try a different shorter solution.

Signed-off-by: Stefan Weil <8d4c780fcfdc41841e5070f4c43da8958ba6aec0@weilnetz.de>
stweil/tesseract,UB-Mannheim/tesseract,jbarlow83/tesseract,tesseract-ocr/tesseract,tesseract-ocr/tesseract,UB-Mannheim/tesseract,stweil/tesseract,jbarlow83/tesseract,jbarlow83/tesseract,tesseract-ocr/tesseract,stweil/tesseract,UB-Mannheim/tesseract,amitdo/tesseract,UB-Mannheim/tesseract,amitdo/tesseract,amitdo/tesseract,amitdo/tesseract,tesseract-ocr/tesseract,stweil/tesseract,jbarlow83/tesseract,UB-Mannheim/tesseract,amitdo/tesseract,jbarlow83/tesseract,tesseract-ocr/tesseract,stweil/tesseract