translator: Scope all classes with "sh".

I was seeing an odd problem with our PoolAlloc conflicting with the
glslang/Vulkan TIntermNode, so the fix was to move everything to a
separate namespace.

The bison grammars are also regenerated. No functional changes.

BUG=angleproject:1576

Change-Id: I959c7afe4c092f0d458432c07b4dcee4d39513f3
Reviewed-on: https://chromium-review.googlesource.com/408267
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/translator/OutputHLSL.cpp b/src/compiler/translator/OutputHLSL.cpp
index 3b97c42..5ef2e89 100644
--- a/src/compiler/translator/OutputHLSL.cpp
+++ b/src/compiler/translator/OutputHLSL.cpp
@@ -28,6 +28,9 @@
 #include "compiler/translator/blocklayout.h"
 #include "compiler/translator/util.h"
 
+namespace sh
+{
+
 namespace
 {
 
@@ -72,9 +75,6 @@
 
 } // namespace
 
-namespace sh
-{
-
 OutputHLSL::OutputHLSL(sh::GLenum shaderType,
                        int shaderVersion,
                        const TExtensionBehavior &extensionBehavior,
@@ -2854,6 +2854,4 @@
     }
 }
 
-
-
-}
+}  // namespace sh