Added a `no-default' option that compiles SVG support
but keeps no default rendering port. Thus, the client
application must inject its own hooks.
* builds/unix/configure.raw: Changes in the build
system to support `no-default'.
* builds/unix/unix-cc.in: Add `COMPILE_SVG_PORT' var
to ultimately let the `rules.mk' in `svg' folder know
whether to build the port files or not.
* include/freetype/config/ftoption.h: Change the flag
`FT_CONFIG_OPTION_SVG_DEFAULT' to `*_DEFAULT_SVG' as
`sed' and `ftoption_set' has a problem with the older
version.
* src/svg/ftsvg.c: Ditto.
* src/svg/rules.mk: Compile the port only if
`COMPILE_SVG_PORT' is set.
Moazin Khatti