[stmt.jump.general] Replace index for "destruction of local variable"

... with "destruction of block variable with automatic storage duration"

Author: frederick-vs-ja

source/statements.tex

@@ -805,7 +805,7 @@
 \end{bnf}
 
 \pnum
-\indextext{local variable!destruction of}%
+\indextext{block variable with automatic storage duration!destruction of}%
 \indextext{scope!destructor and exit from}%
 \begin{note}
 On exit from a scope (however accomplished), objects with automatic storage