Bump to 1.0.4

Signed-off-by: Austin Yuan <shengquan.yuan@gmail.com>
diff --git a/configure.ac b/configure.ac
index c3fa124..8792dcc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@
           [libva_major_version.libva_minor_version.libva_micro_version])
 
 # if the library source code has changed, increment revision
-m4_define([libva_lt_revision], [3])
+m4_define([libva_lt_revision], [4])
 # if any interface was added/removed/changed, then inc current, reset revision
 m4_define([libva_lt_current], [1])
 # if any interface was added since last public release, then increment age