changelog: in C99 `inline` shouldn't be part of function definition

- C99 standard dictates that `inline` should be used only to hint
  function implementation not as a definition
          - http://clang.llvm.org/compatibility.html#inline
  This also leads to run time issues as 'undefined symbols'

- Remember to use adding explicit headers when using an external
  function

Change-Id: I66a9030da7ac38ded6e0b6a977182be977382fa2
BUG: 1089172
Signed-off-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-on: http://review.gluster.org/7655
Reviewed-by: Anand Avati <avati@redhat.com>
Tested-by: Anand Avati <avati@redhat.com>