defined half* as min16float* as it is required by the HLSLcc compiler to make proper half precision float in mobile

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/Common.hlsl

 #define real3x3 half3x3
 #define real3x4 half3x4
 #define real4x3 half4x3
-#define real4x4 half4x4
+#define real4x4 half4x4
+
+#define half min16float
+#define half2 min16float2
+#define half3 min16float3
+#define half4 min16float4
+
+#define half2x2 min16float2x2
+#define half2x3 min16float2x3
+#define half3x2 min16float3x2
+#define half3x3 min16float3x3
+#define half3x4 min16float3x4
+#define half4x3 min16float4x3
+#define half4x4 min16float4x4
 
 #define REAL_MIN HALF_MIN
 #define REAL_MAX HALF_MAX