Standard shader's specular on iOS has artifacts

[Steva]

We’ve found a solution by forcing higher precision floats for mobile:

Standard shader material directional light reflection creates big white artefacts on iOS

We've found a solution by forcing float instead of min16float in HLSLSupport.cginc. Replace: #if defined(SHADER_API_GLES3) || defined(SHADER_API_VULKAN) || (defined(SHADER_API_MOBILE) && defined(SHADER_API_METAL) && defined(UNITY_COMPILER_HLSLCC)) // GLES3 and later via HLSLcc, use DX11.1 partial precision for translation // we specifically define fixed to be float16 (same as half) as all new GPUs seems to agree on float16 being minimal precision float #define fixed min16float #define fixed2…