THRIFT-4033 disable thrift compiler plug-in support by default, as the thrift-compiler packaging is not ready for it yet

This closes #1157
diff --git a/configure.ac b/configure.ac
index 0452a15..6415e3d 100755
--- a/configure.ac
+++ b/configure.ac
@@ -552,8 +552,8 @@
 AM_CONDITIONAL(WITH_TESTS, [test "$have_tests" = "yes"])
 
 AC_ARG_ENABLE([plugin],
-  AS_HELP_STRING([--enable-plugin], [build compiler plugin support [default=yes]]),
-  [], enable_plugin=yes
+  AS_HELP_STRING([--enable-plugin], [build compiler plugin support [default=no]]),
+  [], enable_plugin=no
 )
 have_plugin=yes
 if test "$have_cpp" = "no" ; then
@@ -562,9 +562,7 @@
 if test "$enable_plugin" = "no"; then
   have_plugin="no"
 fi
-if test "$have_plugin" = "yes" ; then
-  AC_CONFIG_LINKS([compiler/cpp/test/plugin/t_cpp_generator.cc:compiler/cpp/src/thrift/generate/t_cpp_generator.cc])
-fi
+AC_CONFIG_LINKS([compiler/cpp/test/plugin/t_cpp_generator.cc:compiler/cpp/src/thrift/generate/t_cpp_generator.cc])
 AM_CONDITIONAL(WITH_PLUGIN, [test "$have_plugin" = "yes"])
 
 AC_ARG_ENABLE([tutorial],