libgo: Fix typo for is_dragonfly in configure script.

From-SVN: r204999
diff --git a/libgo/configure.ac b/libgo/configure.ac
index 1e84dc7..0ffcaf9 100644
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -154,7 +154,7 @@
 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
-AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonly = yes)
+AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
 AC_SUBST(GOOS)