build: update introspection.m4 file.
build: update introspection.m4 file.

janmarthedal/mathml2svg,gjtorikian/lasem,janmarthedal/mathml2svg,wavewave/lasem,janmarthedal/mathml2svg,gjtorikian/lasem,wavewave/lasem,wavewave/lasem,gjtorikian/lasem,wavewave/lasem,janmarthedal/mathml2svg,gjtorikian/lasem