RSVG: let srcdir relative files depend on build sources
RSVG: let srcdir relative files depend on build sources

We let existing sources files (*.c) depend on build sources (*enums.h),
so the build sources get built *before* compilation. For builds with
srcdir!=builddir, this only works if those source files are specified
srcdir relative.

Signed-off-by: Tim Janik <6ec6ff229c4e1c5bbd5933ee92e6c5832ff023bb@gnu.org>

tim-janik/rapicorn,tim-janik/rapicorn,tim-janik/rapicorn,tim-janik/rapicorn,tim-janik/rapicorn