autotools: Add AC_LANG_SOURCE required for autotools >= 2.68

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
1 file changed
tree: 74748349fa7799d3a120101992e71286d6e63eaa
  1. include/
  2. libgsmhr/
  3. m4/
  4. src/
  5. .gitignore
  6. configure.ac
  7. gpl-3.0.txt
  8. Makefile.am