HLSL: Fix unary and binary operator type conversion issues

This fixes defects as follows:

1. handleLvalue could be called on a non-L-value, and it shouldn't be.

2. HLSL allows unary negation on non-bool values.  TUnaryOperator::promote
   can now promote other types (e.g, int, float) to bool for this op.

3. HLSL allows binary logical operations (&&, ||) on arbitrary types, similar
   (2).

4. HLSL allows mod operation on arbitrary types, which will be promoted.
   E.g, int % float -> float % float.

gtests/Hlsl.FromFile.cpp

@@ -142,6 +142,8 @@ INSTANTIATE_TEST_CASE_P(
         {"hlsl.load.rwtexture.array.dx10.frag", "main"},
         {"hlsl.load.offset.dx10.frag", "main"},
         {"hlsl.load.offsetarray.dx10.frag", "main"},
+        {"hlsl.logical.unary.frag", "main"},
+        {"hlsl.logical.binary.frag", "main"},
         {"hlsl.multiEntry.vert", "RealEntrypoint"},
         {"hlsl.multiReturn.frag", "main"},
         {"hlsl.matrixindex.frag", "main"},
@@ -149,6 +151,7 @@ INSTANTIATE_TEST_CASE_P(
         {"hlsl.overload.frag", "PixelShaderFunction"},
         {"hlsl.pp.line.frag", "main"},
         {"hlsl.precise.frag", "main"},
+        {"hlsl.promote.binary.frag", "main"},
         {"hlsl.promotions.frag", "main"},
         {"hlsl.rw.bracket.frag", "main"},
         {"hlsl.rw.scalar.bracket.frag", "main"},
@@ -179,7 +182,7 @@ INSTANTIATE_TEST_CASE_P(
         {"hlsl.samplelevel.basic.dx10.vert", "main"},
         {"hlsl.samplelevel.offset.dx10.frag", "main"},
         {"hlsl.samplelevel.offsetarray.dx10.frag", "main"},
-        { "hlsl.sample.sub-vec4.dx10.frag", "main"},
+        {"hlsl.sample.sub-vec4.dx10.frag", "main"},
         {"hlsl.semicolons.frag", "main"},
         {"hlsl.shapeConv.frag", "main"},
         {"hlsl.shapeConvRet.frag", "main"},