change lowering names

src/targets/cpu/include/migraphx/cpu/lowering.hpp

@@ -13,7 +13,7 @@ namespace cpu {
 
 struct lowering
 {
-    std::string name() const { return "lowering"; }
+    std::string name() const { return "cpu::lowering"; }
     void apply(module& m) const;
 };
 

src/targets/gpu/include/migraphx/gpu/lowering.hpp

@@ -14,7 +14,7 @@ struct lowering
 {
     context* ctx;
     bool offload_copy;
-    std::string name() const { return "lowering"; }
+    std::string name() const { return "gpu::lowering"; }
     void apply(module& m) const;
 };
 

src/targets/ref/include/migraphx/ref/lowering.hpp

@@ -10,7 +10,7 @@ namespace ref {
 
 struct lowering
 {
-    std::string name() const { return "lowering"; }
+    std::string name() const { return "ref::lowering"; }
     void apply(module& m) const;
 };