Fix function name, "revert" -> "reverse"

(See the discussion in the comments to
<https://gerrit.libreoffice.org/#/c/80317/> "fix various warnings in
compilerplugins".)

Change-Id: Ia6ba32206ddf44bba9bb5acdd929c0750c48cca9
Reviewed-on: https://gerrit.libreoffice.org/80372
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

compilerplugins/clang/empty.cxx

@@ -19,7 +19,7 @@
 
 namespace
 {
-BinaryOperatorKind revert(BinaryOperatorKind op)
+BinaryOperatorKind reverse(BinaryOperatorKind op)
 {
     switch (op)
     {
@@ -177,7 +177,7 @@ private:
         }
         else if (auto const call = dyn_cast<CallExpr>(expr->getRHS()->IgnoreParenImpCasts()))
         {
-            visitComparison(expr, call, expr->getLHS(), revert(expr->getOpcode()));
+            visitComparison(expr, call, expr->getLHS(), reverse(expr->getOpcode()));
         }
     }
 };