[flang-commits] [flang] [flang] Add target=sparc check for big endian (NFC) (PR #105854)

[Rainer Orth via flang-commits]

https://github.com/rorth approved this pull request.

Tested on both Solaris/sparcv9 and Solaris/amd64: worked just fine on both.  Thanks.

https://github.com/llvm/llvm-project/pull/105854