allow packages to reference their own items explicitly

test/basic/package_self_reference.sv

@@ -0,0 +1,8 @@
+package P;
+    localparam Bar = 1;
+    localparam Foo = P::Bar;
+endpackage
+module top;
+    import P::*;
+    initial $display(Foo);
+endmodule

test/basic/package_self_reference.v

@@ -0,0 +1,4 @@
+module top;
+    localparam Foo = 1;
+    initial $display(Foo);
+endmodule

test/basic/package_self_reference_import.sv

@@ -0,0 +1,11 @@
+package Q;
+    localparam Bar = 1;
+endpackage
+package P;
+    import Q::Bar;
+    localparam Foo = P::Bar;
+endpackage
+module top;
+    import P::*;
+    initial $display(Foo);
+endmodule

test/basic/package_self_reference_import.v

@@ -0,0 +1,4 @@
+module top;
+    localparam Foo = 1;
+    initial $display(Foo);
+endmodule

test/basic/package_self_reference_shadow.sv

@@ -0,0 +1,11 @@
+package P;
+    localparam Bar = 1;
+    function automatic integer func;
+        localparam Bar = 2;
+        func = Bar + P::Bar;
+    endfunction
+endpackage
+module top;
+    import P::*;
+    initial $display(func());
+endmodule

test/basic/package_self_reference_shadow.v

@@ -0,0 +1,5 @@
+module top;
+    localparam Foo = 1;
+    localparam Bar = 2;
+    initial $display(Foo + Bar);
+endmodule