libtrellis: Fix ECLKSYNCB naming

Signed-off-by: David Shah <dave@ds0.me>

libtrellis/src/Bels.cpp

diff --git a/libtrellis/src/Bels.cpp b/libtrellis/src/Bels.cpp
index f88339f..7a84774 100644
--- a/libtrellis/src/Bels.cpp
+++ b/libtrellis/src/Bels.cpp
@@ -541,7 +541,7 @@
         add_output("CDIVX");
     } else if (name == "ECLKSYNCB") {
         postfix = "ECLKSYNC" + std::to_string(i);
-        bel.name = graph.ident(postfix);
+        bel.name = graph.ident(postfix + "_BK" + std::to_string(bank));
         bel.z = 8 + i;
         add_input("ECLKI", false);
         add_input("STOP");