[binutils-gdb] Add noexcept to custom non-throwing new operators.

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT bbe910e6e1140cb484a74911f3cea854cf9e7e2a ***

Author: John Baldwin <jhb@FreeBSD.org>
Branch: master
Commit: bbe910e6e1140cb484a74911f3cea854cf9e7e2a

Add noexcept to custom non-throwing new operators.

Both libc++ and libstdc++ declare non-throwing new operators as
noexcept and overloads must also be noexcept.  This fixes a
-Wmissing-exception-spec warning with clang.

gdb/ChangeLog:

	* common/new-op.c (operator new): Mark 'noexcept'.
	(operator new[]): Likewise.