Web: Turn off includes, independent preprocessing path, fine tune all.

Saved about 21K, size down to 380K of MSVC x86 code.
Fixed one bug that needs to be looked at on the master branch:
The test for needing a Vulkan binding has a bug in it, "!layoutAttachment"
which does not mean "no layoutAttachment", because that is non-zero.
This is why some test and test results changed.

glslang/MachineIndependent/ParseHelper.h

@@ -476,10 +476,11 @@ protected:
     TQualifier globalUniformDefaults;
     TQualifier globalInputDefaults;
     TQualifier globalOutputDefaults;
-    int* atomicUintOffsets;       // to become an array of the right size to hold an offset per binding point
     TString currentCaller;        // name of last function body entered (not valid when at global scope)
-    TIdSetType inductiveLoopIds;
+#ifndef GLSLANG_WEB
+    int* atomicUintOffsets;       // to become an array of the right size to hold an offset per binding point
     bool anyIndexLimits;
+    TIdSetType inductiveLoopIds;
     TVector<TIntermTyped*> needsIndexLimitationChecking;
 
     //
@@ -515,6 +516,7 @@ protected:
     //    array-sizing declarations
     //
     TVector<TSymbol*> ioArraySymbolResizeList;
+#endif
 };
 
 } // end namespace glslang