Makefile: Use filter-out to remove TOFU'd font files.
Makefile: Use filter-out to remove TOFU'd font files.

In case the TOFU is set in config.h rather than via XCFLAGS, build the
font files and rely on the linker to exclude them.

ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf