flang requires openmp-extras, which is missing in the dependency

Description:

The package misses the dependency on openmp-extras, thus flang cannot compile any file even if OpenMP is disabled.

Additional info:

• package version(s): 6.0.2-1
• config and/or log files:
• link to upstream bug report, if any: I tried yay -S openmp-extras but it failed (https://github.com/rocm-arch/rocm-arch/issues/987)

Steps to reproduce:

$ yay -S rocm-llvm
$ touch a.f90
$ /opt/rocm/lib/llvm/bin/flang -c a.f90 
flang: warning: flang1 not found, 'openmp-extras' package from ROCm may be missing. [-Winvalid-command-line-argument]
flang: warning: flang2 not found, 'openmp-extras' package from ROCm may be missing. [-Winvalid-command-line-argument]
flang: error: unable to execute command: Executable "flang1" doesn't exist!

OTOH clang can compile a C file (without OpenMP):

$ echo 'int main() {}' | /opt/rocm/lib/llvm/bin/clang -x c -
$ echo $?
0