Added a test for the Memory Content File inclusion using $readmemb

Signed-off-by: Rodrigo Alejandro Melo <rodrigomelo9@gmail.com>

tests/memfile/memory.v

@@ -0,0 +1,23 @@
+// A memory initialized with an external file
+
+module memory (
+    input             clk_i,
+    input             we_i,
+    input       [5:0] addr_i,
+    input      [31:0] data_i,
+    output reg [31:0] data_o
+);
+
+parameter MEMFILE = "";
+
+reg [31:0] mem [0:63];
+
+initial $readmemb(MEMFILE,mem);
+
+always @(posedge clk_i) begin
+    if (we_i)
+        mem[addr_i] <= data_i;
+    data_o <= mem[addr_i];
+end
+
+endmodule