File disable-build-html-docs.patch of Package corosync

--- corosync-2.4.2.orig/configure.ac	2016-11-08 00:39:12.000000000 +0800
+++ corosync-2.4.2/configure.ac	2016-12-06 16:43:05.586962439 +0800
@@ -726,7 +726,8 @@
 AM_CONDITIONAL(AUGTOOL, test -n "${AUGTOOL}")
 AC_SUBST([NSS_LDFLAGS])
 
-AM_CONDITIONAL(BUILD_HTML_DOCS, test -n "${GROFF}")
+AM_CONDITIONAL(BUILD_HTML_DOCS, false)
+#AM_CONDITIONAL(BUILD_HTML_DOCS, test -n "${GROFF}")
 
 AC_SUBST([LINT_FLAGS])