[gdal/f17] (3 commits) ...Use the correct shell idiom "if true" instead of "if 1"

[jamatos]

Summary of changes:

  b0e11d4... Ignore for the moment the test for armadillo (*)
  9bff36d... Ignore for the moment the test for armadillo (to be removed (*)
  50064c4... Use the correct shell idiom "if true" instead of "if 1" (*)

(*) This commit already existed in another branch; no separate mail sent