build-sys: meson: restore big endian detection
Autotools used AC_C_BIGENDIAN to set WORDS_BIGENDIAN, add Meson implementation.
Tested on ppc64
Fixes #1218 (closed)
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
Autotools used AC_C_BIGENDIAN to set WORDS_BIGENDIAN, add Meson implementation.
Tested on ppc64
Fixes #1218 (closed)