Introduce new BinaryObject (blob) class, ELF Writer modified to use it. BinaryObject.h by Aaron Gray

llvm-svn: 73333

Emission for globals, using the correct data sections
Function alignment can be computed for each target using TargetELFWriterInfo
Some small fixes

llvm-svn: 73201

relocation sections.

llvm-svn: 73038

llvm-svn: 72982

MachO Writer. This will change with the arrival of ObjectCodeEmitter and
BinaryObject

llvm-svn: 72906

llvm-svn: 72785