[PATCH, libstdc++] Add missing free-standing headers to install rule

[Bernd Edlinger]

Hi,

when the free-standing libstdc++-headers are installed, the C++ header
file <new> does not always compile, because it includes <exception> and this
includes under certain conditions (__cplusplus >= 201103L &&
ATOMIC_INT_LOCK_FREE > 1) the header file <bits/nested_exception.h>
but that fails to compile because it needs <bits/move.h> which is not installed.
This condition depends on the target, and for instance an arm-eabi
eCos compiler fails to compile <new> with -mcpu=cortex-a9 and the
default C++ standard option, while it is OK with ARMv4 CPUs.

Therefore this patch adds move.h and concept_check.h to the installed headers,
unconditionally.

I've verified that the <new> header compiles on an eCos cross compiler.

Boot-strapped and regression-tested on x86_64-pc-linux-gnu.
Is it OK for trunk?


Thanks
Bernd.
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