gstlal-inspiral: add probationary inspiral_snr_pdf.xml.gz file

- contains SNR pdfs for 1- and 2-instrument candidates collected from the H1,L1 network with equal horizon distances, with 0, 1 or 2 instruments operating

gstlal-inspiral/share/Makefile.am

 dist_pkgdata_DATA = \
+	inspiral_snr_pdf.xml.gz \
 	ll_simplify_and_cluster.sql \
 	ll_simplify.sql \
 	Makefile.triggers_example \
@@ -13,3 +14,11 @@ dist_pkgdata_DATA = \
 	de_calc_likelihood.sql \
 	inj_simplify_and_cluster.sql \
 	simplify_and_cluster.sql
+
+inspiral_snr_pdf.xml.gz :
+	gstlal_inspiral_make_snr_pdf --verbose --output $@ \
+		--horizon-distances H1=0,L1=0 \
+		--horizon-distances H1=0,L1=100 \
+		--horizon-distances H1=100,L1=0 \
+		--horizon-distances H1=100,L1=100 \
+		--min-instruments 1