doc/Makefile.am: add chapters/sched_ctx_hypervisor.texi to dist file

doc/Makefile.am

@@ -33,7 +33,8 @@ starpu_TEXINFOS = chapters/advanced-api.texi \
 	chapters/fft-support.texi \
 	chapters/using.texi \
 	chapters/vector_scal_opencl.texi \
-	chapters/socl.texi
+	chapters/socl.texi \
+	chapters/sched_ctx_hypervisor.texi
 
 MAINTAINERCLEANFILES = starpu.pdf