Add precision qualifier propagation for swizzling, texture lookups, built-in funtions mapped to operators, comma op, and more robustly propagate for all binary/unary ops.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@21622 e7fa87d3-cd2b-0410-9028-fcbf551c1848

glslang/Include/intermediate.h

@@ -482,6 +482,7 @@ public:
     virtual TIntermTyped* getRight() const { return right; }
     virtual TIntermBinary* getAsBinaryNode() { return this; }
     virtual bool promote(TInfoSink&);
+    virtual void updatePrecision();
 protected:
     TIntermTyped* left;
     TIntermTyped* right;
@@ -499,6 +500,7 @@ public:
     virtual TIntermTyped* getOperand() { return operand; }
     virtual TIntermUnary* getAsUnaryNode() { return this; }
     virtual bool promote(TInfoSink&);
+    virtual void updatePrecision();
 protected:
     TIntermTyped* operand;
 };