patch 8.0.1700: coverage statistics still don't work on coveralls

Problem:    Coverate statistics still don't work on coveralls.
Solution:   Exclude the xxd directory again.

.travis.yml

@@ -108,7 +108,7 @@ script:
  - if [ -n "$err" ]; then exit 1; fi

after_success:
  - if [ "$COVERAGE" = "yes" ]; then ~/.local/bin/coveralls -b ${SRCDIR} -x .xs -i ${SRCDIR}/xxd -e ${SRCDIR}/if_perl.c --encodings utf-8 latin-1 EUC-KR; fi
  - if [ "$COVERAGE" = "yes" ]; then ~/.local/bin/coveralls -b ${SRCDIR} -x .xs -e ${SRCDIR}/xxd -e ${SRCDIR}/if_perl.c --encodings utf-8 latin-1 EUC-KR; fi
  - if [ "$COVERAGE" = "yes" ]; then  cd ${SRCDIR} && bash <(curl -s https://codecov.io/bash) ; fi

# vim:set sts=2 sw=2 tw=0 et:

src/version.c

@@ -762,6 +762,8 @@ static char *(features[]) =

static int included_patches[] =
{   /* Add new patch number below this line */
/**/
    1700,
/**/
    1699,
/**/