Suppress all warnings for Metal compiler.

After going through cross-compilation the warnings don't really give much
value as they can't be associated back to the original source.

Updated glslang and SPIRV-Cross.

Incremented version to 1.6.1.

Author: akb825

CMakeLists.txt

@@ -81,7 +81,7 @@ endif()
 
 set(MSL_MAJOR_VERSION 1)
 set(MSL_MINOR_VERSION 6)
-set(MSL_PATCH_VERSION 0)
+set(MSL_PATCH_VERSION 1)
 set(MSL_VERSION ${MSL_MAJOR_VERSION}.${MSL_MINOR_VERSION}.${MSL_PATCH_VERSION})
 
 set(MSL_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

Compile/SPIRV-Cross

@@ -300,10 +300,9 @@ bool TargetMetal::compileMetal(std::vector<std::uint8_t>& data, Output& output,
 	if (!getStripDebug())
 		extraOptions += " -gline-tables-only -MO";
 
-	// Optimized code sometimes creates unused float3 constants.
-	// TODO: Check if future versions of SPIRV-Tools no longer cause this to happen.
-	if (getOptimize() == Optimize::Full)
-		extraOptions += " -Wno-unused-const-variable";
+	// The output sometimes contains warnings that we can't control or make sense of in the final
+	// generated output.
+	extraOptions += " -w";
 
 	ExecuteCommand compile(".metal");
 	compile.getInput().write(metal.data(), metal.size());