LOG4CXX-512 Update configure.ac for autotools builds
diff --git a/configure.ac b/configure.ac
index 561928c..f6b3f44 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,7 @@
 #  ? :+1 : ?   == just some internal changes, nothing breaks but might work
 #                 better
 # CURRENT : REVISION : AGE
-LT_VERSION=10:0:0
+LT_VERSION=11:0:0
 
 AC_SUBST(LT_VERSION)