libgccjit: Add support for setting the alignment [PR104293]

libgccjit: Add support for setting the alignment [PR104293]

gcc/jit/
	PR jit/104293
	* docs/_build/texinfo/libgccjit.texi: Regenerate.
	* docs/topics/compatibility.rst (LIBGCCJIT_ABI_24): New ABI tag.
	* docs/topics/expressions.rst: Add documentation for the
	functions gcc_jit_lvalue_set_alignment and
	gcc_jit_lvalue_get_alignment.
	* jit-playback.h: New function (set_alignment).
	* jit-recording.cc: New function (set_alignment).
	* jit-recording.h: New functions (set_alignment, get_alignment)
	and new field (m_alignment).
	* libgccjit.cc: New functions (gcc_jit_lvalue_get_alignment,
	gcc_jit_lvalue_set_alignment)
	* libgccjit.h: New functions (gcc_jit_lvalue_get_alignment,
	gcc_jit_lvalue_set_alignment)
	* libgccjit.map (LIBGCCJIT_ABI_24): New ABI tag.

gcc/testsuite/
	PR jit/104293
	* jit.dg/all-non-failing-tests.h: Mention
	test-setting-alignment.
	* jit.dg/test-setting-alignment.c: New test.