update: release version from 2.4.8.4 to 2.4.9.0 (#632)

Author: vandelvan

configure.ac

@@ -36,7 +36,7 @@
 dnl
 dnl LTFS configure.ac.
 dnl
-AC_INIT([LTFS], [2.4.8.4 (Prelim)], IBM corporation.)
+AC_INIT([LTFS], [2.4.9.0 (Prelim)], IBM corporation.)
 AC_CONFIG_SRCDIR([src/main.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIRS([m4])