Added amdflang to the flang patch.

[AcerP-py]

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When building mpich 5.0.1 with rocm 7.2.0 using the amdflang compiler I get.

make[2]: Entering directory '/lustre/orion/stf243/world-shared/MPI/build/build'
Makefile:12529: warning: overriding recipe for target 'lib/libmpi.la'
Makefile:9136: warning: ignoring old recipe for target 'lib/libmpi.la'
  GEN      lib/libmpifort.la
flang-22: error: unknown argument: '--whole-archive'
flang-22: error: unknown argument: '--no-whole-archive'
flang-22: error: unknown argument: '-soname'
flang-22: error: no such file or directory: 'libmpifort.so.0'                                                   
make[2]: *** [Makefile:9139: lib/libmpifort.la] Error 1 

So I added the amdflang compiler to the flang patch so it would get the correct arguments.

I saw that I need to submit an agreement from https://www.mpich.org/documentation/contributor-docs/ to contribute. Where do I submit that to?

[hzhou]

I saw that I need to submit an agreement from https://www.mpich.org/documentation/contributor-docs/ to contribute. Where do I submit that to?

Send to cla@mpich.org.