gstlal-burst: add missing + update .m4

gstlal-burst/gnuscripts/ax_append_flag.m4

gstlal-burst/gnuscripts/ax_cflags_warn_all.m4

gstlal-burst/gnuscripts/ax_check_compile_flag.m4

gstlal-burst/gnuscripts/ax_compare_version.m4

gstlal-burst/gnuscripts/ax_compiler_vendor.m4

gstlal-burst/gnuscripts/ax_gcc_archflag.m4

gstlal-burst/gnuscripts/ax_gcc_x86_cpuid.m4

gstlal-burst/gnuscripts/ax_openmp.m4

gstlal-burst/gnuscripts/ax_python_devel.m4

gstlal-burst/gnuscripts/ax_python_module.m4

gstlal-burst/gnuscripts/ax_require_defined.m4

gstlal-burst/gnuscripts/ax_split_version.m4

gstlal-burst/gnuscripts/depcomp