[clang] [flang] [flang][Driver] Add option for real sum reassociation (PR #207377)

[Tom Eccles via cfe-commits]

tblah wrote:

Note that this flag is now called -ffp-sum-reassociation since it was generalised to work with COMPLEX types as well as REAL.

https://github.com/llvm/llvm-project/pull/207377