NFC: Fix some out of sync doccomments.

Author: tshortli

include/swift/Sema/ConstraintSystem.h

@@ -4423,7 +4423,7 @@ class ConstraintSystem {
   /// \param UseDC The context of the access.  Some variables have different
   ///   types depending on where they are used.
   ///
-  /// \param memberLocator The locator anchored at this value reference, when
+  /// \param locator The locator anchored at this value reference, when
   /// it is a member reference.
   ///
   /// \param wantInterfaceType Whether we want the interface type, if available.
@@ -4441,7 +4441,7 @@ class ConstraintSystem {
   /// \param UseDC The context of the access.  Some variables have different
   ///   types depending on where they are used.
   ///
-  /// \param memberLocator The locator anchored at this value reference, when
+  /// \param locator The locator anchored at this value reference, when
   /// it is a member reference.
   ///
   /// \param wantInterfaceType Whether we want the interface type, if available.