Add missing logical bitwise operators to the little-endian storage classes

These make the (future) usage in declarative even more convenient.

Change-Id: I12c0fec1ea843d8acd2ee3fdf2a2189939bebd95
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

src/corelib/json/qjson_p.h

@@ -151,6 +151,14 @@ public:
         val = qToLittleEndian(qFromLittleEndian(val) + i);
         return *this;
     }
+    q_littleendian &operator |=(T i) {
+        val = qToLittleEndian(qFromLittleEndian(val) | i);
+        return *this;
+    }
+    q_littleendian &operator &=(T i) {
+        val = qToLittleEndian(qFromLittleEndian(val) & i);
+        return *this;
+    }
 };
 } // namespace QJsonPrivate
 
@@ -205,6 +213,14 @@ public:
         *this = (uint(*this) - i);
         return *this;
     }
+    qle_bitfield &operator |=(uint i) {
+        *this = (uint(*this) | i);
+        return *this;
+    }
+    qle_bitfield &operator &=(uint i) {
+        *this = (uint(*this) & i);
+        return *this;
+    }
 };
 
 template<int pos, int width>