Add testcase corresponding to issue #1342 (#1380)

Author: SantiagoBautista

testdata/p4_16_samples/issue1342.p4

@@ -0,0 +1,5 @@
+const bit X = 1;
+
+bit f<X>() {
+  return .X ;
+}

testdata/p4_16_samples_outputs/issue1342-first.p4

@@ -0,0 +1,4 @@
+const bit<1> X = 1w1;
+bit<1> f<X>() {
+    return 1w1;
+}

testdata/p4_16_samples_outputs/issue1342-frontend.p4

@@ -0,0 +1,4 @@
+const bit<1> X = 1;
+bit<1> f<X>() {
+    return .X;
+}

testdata/p4_16_samples_outputs/issue1342.p4

@@ -0,0 +1,7 @@
+issue1342.p4(3): warning: X shadows X
+bit f<X>() {
+      ^
+issue1342.p4(1)
+const bit X = 1;
+              ^
+warning: Program does not contain a `main' module