Lighttpd

This patch fixes two build errors on Mac OS X when using cmake. One occurs because the gthread libraries aren't passed to ld, the other occurs when not using BUILD_STATIC:

$ make  
[  0%] Built target lemon
[ 56%] Built target lighttpd
Linking C shared library mod_access.dylib
ld: Undefined symbols:
_array_free
_array_init
_buffer_init_string
_buffer_is_equal_string
_config_check_cond
_config_insert_values_global
/usr/bin/libtool: internal link edit command failed
make[2]: *** [build/mod_access.dylib] Error 1
make[1]: *** [build/CMakeFiles/mod_access.dir/all] Error 2
make: *** [all] Error 2