Rename version to shaderModel

In order to avoid creating confusion between shader model and
the actual shader's version, as specified by the #version
token in a glsl shader, version was renamed to shaderModel.

Change-Id: I481b6e3fc43168b504c2f2d9506422a697abc3a2
Reviewed-on: https://swiftshader-review.googlesource.com/14629
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

src/Renderer/PixelProcessor.cpp

diff --git a/src/Renderer/PixelProcessor.cpp b/src/Renderer/PixelProcessor.cpp
index 003cfb3..f76c387 100644
--- a/src/Renderer/PixelProcessor.cpp
+++ b/src/Renderer/PixelProcessor.cpp
@@ -1062,7 +1062,7 @@
 		const bool sprite = context->pointSpriteActive();
 		const bool flatShading = (context->shadingMode == SHADING_FLAT) || point;
 
-		if(context->pixelShaderVersion() < 0x0300)
+		if(context->pixelShaderModel() < 0x0300)
 		{
 			for(int coordinate = 0; coordinate < 8; coordinate++)
 			{
@@ -1079,7 +1079,7 @@
 					}
 				}
 
-				if(context->textureTransformProject[coordinate] && context->pixelShaderVersion() <= 0x0103)
+				if(context->textureTransformProject[coordinate] && context->pixelShaderModel() <= 0x0103)
 				{
 					if(context->textureTransformCount[coordinate] == 2)
 					{
@@ -1173,7 +1173,7 @@
 
 		if(!routine)
 		{
-			const bool integerPipeline = (context->pixelShaderVersion() <= 0x0104);
+			const bool integerPipeline = (context->pixelShaderModel() <= 0x0104);
 			QuadRasterizer *generator = nullptr;
 
 			if(integerPipeline)