[PATCH] [yaml2obj][COFF] Allow variable number of directories

[PATCH] [yaml2obj][COFF] Allow variable number of directories

Allow variable number of directories, as allowed by the
specification. NumberOfRvaAndSize will default to 16 if not specified,
as in the past.

Reviewed by: jhenderson

Differential Revision: https://reviews.llvm.org/D108825

Gbp-Pq: Name yaml2obj-COFF-Allow-variable-number-of-directories.patch