openbsc: add missing AC_LANG_SOURCE for current autoconf

autoconf >=2.68 demands the body of an AC_COMPILE_IFELSE to be wrapped in
an AC_LANG_SOURCE macro, otherwise outputs annoying warnings on the
invocation of `autoreconf -i`. this patch follows that demand.
1 file changed
tree: e0b354af81715c491b2615355f13bb131059437c
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/
  5. README