Fix typos

Change-Id: Ice72f8d9971e15dd6ef365e64cd567b8581a92d3
Reviewed-on: https://gerrit.libreoffice.org/21797
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>

compilerplugins/clang/unusedmethods.cxx

@@ -261,7 +261,7 @@ bool UnusedMethods::VisitCallExpr(CallExpr* expr)
         }
         /*
         expr->dump();
-        throw "Cant touch this";
+        throw "Can't touch this";
         */
         return true;
     }