moved variables out of the extern "C" wrap

src/plugins/select/bgq/select_bgq.cc

@@ -58,8 +58,6 @@ void *acct_db_conn = NULL;
 char *slurmctld_cluster_name = NULL;
 slurmdb_cluster_rec_t *working_cluster_rec = NULL;
 
-extern "C" {
-
 /* In C++ const objects have internal linkage by default so we have to
  * do an extra extern here to make them export correctly.
  */
@@ -68,6 +66,8 @@ extern const char plugin_type[]       	= "select/bgq";
 extern const uint32_t plugin_id     	= 103;
 extern const uint32_t plugin_version	= 100;
 
+extern "C" {
+
 /*
  * init() is called when the plugin is loaded, before any other functions
  * are called.  Put global initialization here.