11e68c7e7f
Support for vector scale range arguments, for AArch64 scalable vector extension (SVE) support. Adds -msve-vector-bits to the flang frontend, and for flang fc1 the options are -mvscale-min and -mvscale-max (optional). These match the clang and clang cc1 options for the same purposes. A further patch will actually USE these arguments.