[OB PATCH] Disable nested function tests for clang

[Gary Benson]

Pedro Alves wrote:
> On 4/20/20 3:49 PM, Gary Benson via Gdb-patches wrote:
> > Clang does not support nested functions, and there are no plans to
> > change this.  This commit disables the three nested function tests
> > when using clang.
> > 
> > gdb/testsuite/ChangeLog:
> > 
> > 	* gdb.base/nested-subp1.exp: Disable test when using clang.
> > 	* gdb.base/nested-subp2.exp: Likewise.
> > 	* gdb.base/nested-subp3.exp: Likewise.
> 
> Please use the support_nested_function_tests procedure instead.

Thanks, I've updated it.

Cheers,
Gary