[D3D12] Rename shaders/bin to shaders/dxbc because of .gitignore

src/xenia/gpu/d3d12/shaders/dxbc/stretch_ps.txt

@@ -0,0 +1,35 @@
+//
+// Generated by Microsoft (R) HLSL Shader Compiler 10.1
+//
+//
+// Resource Bindings:
+//
+// Name                                 Type  Format         Dim      ID      HLSL Bind  Count
+// ------------------------------ ---------- ------- ----------- ------- -------------- ------
+// xe_sampler                        sampler      NA          NA      S0             s0      1 
+// xe_texture                        texture  float4          2d      T0             t0      1 
+//
+//
+//
+// Input signature:
+//
+// Name                 Index   Mask Register SysValue  Format   Used
+// -------------------- ----- ------ -------- -------- ------- ------
+// TEXCOORD                 0   xy          0     NONE   float   xy  
+//
+//
+// Output signature:
+//
+// Name                 Index   Mask Register SysValue  Format   Used
+// -------------------- ----- ------ -------- -------- ------- ------
+// SV_Target                0   xyzw        0   TARGET   float   xyzw
+//
+ps_5_1
+dcl_globalFlags refactoringAllowed
+dcl_sampler S0[0:0], mode_default, space=0
+dcl_resource_texture2d (float,float,float,float) T0[0:0], space=0
+dcl_input_ps linear v0.xy
+dcl_output o0.xyzw
+sample_l o0.xyzw, v0.xyxx, T0[0].xyzw, S0[0], l(0.000000)
+ret 
+// Approximately 2 instruction slots used