Debug Post Processing Shaders are included in builds, resulting in errors at startup. These errors do not impact the performance or functionality of post processing.

Reproduction Steps:
1. Build & Run a new project using the LWRP Template
2. Look in the output_log.txt file for the build
3. Observe the following warnings and errors:

WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Overlays' - Pass '' has no vertex shader
ERROR: Shader Shader is not supported on this GPU (none of subshaders/fallbacks are suitable)WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Overlays' - Setting to default shader.
WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/LightMeter' - Pass '' has no vertex shader
ERROR: Shader Shader is not supported on this GPU (none of subshaders/fallbacks are suitable)WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/LightMeter' - Setting to default shader.
WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Waveform' - Pass '' has no vertex shader
ERROR: Shader Shader is not supported on this GPU (none of subshaders/fallbacks are suitable)WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Waveform' - Setting to default shader.
WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Vectorscope' - Pass '' has no vertex shader
ERROR: Shader Shader is not supported on this GPU (none of subshaders/fallbacks are suitable)WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Vectorscope' - Setting to default shader.
WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Histogram' - Pass '' has no vertex shader
ERROR: Shader Shader is not supported on this GPU (none of subshaders/fallbacks are suitable)WARNING: Shader Unsupported: 'Hidden/PostProcessing/Debug/Histogram' - Setting to default shader.
WARNING: Shader Unsupported: 'Lightweight Render Pipeline/Lit' - Pass 'Meta' has no vertex shader

Note this is not reproducible when using general Post Processing (non-LWRP).