[Chapel Merge] Adjust .skipif to check CHPL_TARGET_COMPILER instead of CHPL_LLVM

Branch: refs/heads/main
Revision: 23c76baa38a23a42992f2d0fa2f8aaa0b1e92cd5
Author: dlongnecke-cray
Link: Adjust .skipif to check CHPL_TARGET_COMPILER instead of CHPL_LLVM by dlongnecke-cray · Pull Request #27211 · chapel-lang/chapel · GitHub
Log Message:
Adjust .skipif to check CHPL_TARGET_COMPILER instead of CHPL_LLVM (#27211)

In #27210 I skipped a test if CHPL_LLVM=none. The intention was to
skip the test if the LLVM backend is not being used. Adjust the skipif
to check CHPL_TARGET_COMPILER!=llvm instead since that is more
accurate. Trivial and not reviewed.

Compare: Comparing 1ff55ee7b80ccece4256120dc9b312fe19330f90...5b00fcfc145f7af18ed79d81865c4547d8ba41e6 · chapel-lang/chapel · GitHub

Diff:
M test/dynamic-loading/LoadForeignLibrary.skipif
https://github.com/chapel-lang/chapel/pull/27211.diff