add libtool major version detection to configure in prep for supporting both…

add libtool major version detection to configure in prep for supporting both libtool 2.x and 1.5.x at the same time

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12927 d0543943-73ff-0310-b7d9-9358b9ac24b2

configure.in

@@ -129,7 +129,7 @@ esac
 
 LIBTOOL_LIB_EXTEN="$DYNAMIC_LIB_EXTEN"
 
-if test "$LIBTOOL_MAJOR_VERSION" -eq "2"; then
+if test "$LIBTOOL_MAJOR_VERSION" = "2"; then
    LIBTOOL_LIB_EXTEN="la"
 fi