Sablotron can be compiled with support for libjs.  The
newer Sablotron RPMs default to this.  Unfortunately,
if libjs is compiled in, and not linked with the rest
of the php libraries, there are symbol errors.

There should be a routine that can check if sablotron has
been compiled with libjs, and if so, check for libjs
and add it to the set of ldflags in the final compile
phase.