chore, update sxe-compiler.m4 macro package

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, adapt c.ac to missing SXE_CHECK_LDFLAGS

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, remove all unused macro packages

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, update sxe-libtool m4 macro package

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, move libtool checks further down so the linker doesn't interfere with other checks

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
cosmetics, up c.ac's copyright notice

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, check for xiar in c.ac to support intel's IPO

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/dist' into next

* bld/dist:
  minor, check for xiar in c.ac to support intel's IPO
  cosmetics, up c.ac's copyright notice
  fix, move libtool checks further down so the linker doesn't interfere with other checks
  chore, update sxe-libtool m4 macro package
  chore, remove all unused macro packages
  chore, adapt c.ac to missing SXE_CHECK_LDFLAGS
  chore, update sxe-compiler.m4 macro package