binutils: out of bounds memory write in peXXigen.c files

The bfdXXbfdcopyprivatebfddatacommon function in peXXigen.c in the Binary File Descriptor BFD library aka libbfd, as distributed in GNU Binutils 2.30, processes a negative Data Directory size with an unbounded loop that increases the value of externalIMAGEDEBUGDIRECTORY edd so that the address...