[Click] Recent commit broke click build on openwrt

[Roberto Riggio]

  Hi,

this commit:

http://github.com/kohler/click/commit/e24deaae2ee5f326ee0febee18eff81fbeacf527

broke the click build for openwrt. In particular the compilation process 
reports a missing
clock_gettime method (not available on uclibc as far as a I've understood).

Reverting this:

-  [AC_DEFINE([HAVE_CLOCK_GETTIME], [1], [Define if you have the 
clock_gettime function.])])
+  [AC_DEFINE([HAVE_CLOCK_GETTIME], [1], [Define if you have the 
clock_gettime function.])
+  have_clock_gettime=yes])

solve the problem.

R.