Merge pull request #1567 from googlefonts/fuzzer

[subset] Update the subset fuzzer to get  options to use from test case.
diff --git a/configure.ac b/configure.ac
index b7827a6..718f1d0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -515,6 +515,11 @@
 
 AC_OUTPUT
 
+echo
+echo "C++ compiler version:"
+$CXX --version
+echo
+
 AC_MSG_NOTICE([
 
 Build configuration: