build software project in same makefile as hardware project

hdl/tb/core_tb.v

@@ -32,7 +32,7 @@ initial begin: mem_inst_init
     for (i=0; i<MEM_INST_LENGTH; i=i+1) begin
         mem_inst[i] = INST_NOP;
     end
-    $readmemh("../test/text.hex", mem_inst);
+    $readmemh("text.hex", mem_inst);
 end
 
 // Data memory
@@ -48,7 +48,7 @@ initial begin: mem_data_init
     for (i=0; i<MEM_DATA_LENGTH; i=i+1) begin
         mem_data[i] = DATA_DEFAULT;
     end
-    $readmemh("../test/data.hex", mem_data);
+    $readmemh("data.hex", mem_data);
 end
 
 initial begin