chore, prefer xiar over ar when assembling libuterus.a

Signed-off-by: Sebastian Freundt <freundt@fresse.org>
chore, kick not-so-useful checks for LDFLAGS

Signed-off-by: Sebastian Freundt <freundt@fresse.org>
chore, kick the sxe-linker.m4 macro package altogether

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

* bld/dist:
  chore, kick the sxe-linker.m4 macro package altogether
  chore, kick not-so-useful checks for LDFLAGS
  chore, prefer xiar over ar when assembling libuterus.a