hpux: Fix detection of atomic support when profiling

hpux: Fix detection of atomic support when profiling

The pa target lacks atomic sync compare and swap instructions.
These are implemented as libcalls and in libatomic.  As on linux,
we lie about their availability.

This fixes the gcov-30.c test on hppa64-hpux11.

2025-05-19  John David Anglin  <danglin@gcc.gnu.org>

gcc/ChangeLog:

	* config/pa/pa-hpux.h (TARGET_HAVE_LIBATOMIC): Define.
	(HAVE_sync_compare_and_swapqi): Likewise.
	(HAVE_sync_compare_and_swaphi): Likewise.
	(HAVE_sync_compare_and_swapsi): Likewise.
	(HAVE_sync_compare_and_swapdi): Likewise.