Roll all SPIR-V dependencies together.

Function name changed in shaderc.
SPIRV-Cross split up into additional files.

BUG=chromium:951016

Change-Id: I49abb0a163fefdd61b7d6352e57e2a10f519abd9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/6440
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

src/fuzzers/DawnSPIRVCrossGLSLFastFuzzer.cpp

@@ -28,7 +28,7 @@ namespace {
         DawnSPIRVCrossFuzzer::ExecuteWithSignalTrap([&compiler, &input]() {
             // Using the options that are used by Dawn, they appear in ShaderModuleGL.cpp
             shaderc_spvc::CompileOptions options;
-            options.SetOutputLanguageVersion(440);
+            options.SetGLSLLanguageVersion(440);
             options.SetFixupClipspace(true);
             compiler.CompileSpvToGlsl(input.data(), input.size(), options);
         });