linker: rename load_offset to load_bias.

This patch changes the definition of the 'load_offset' field
in struct soinfo. The field is renamed because it is not the
basic load bias to add to every p_vaddr value read from the ELF
file to get the corresponding memory address.

This also slightly simplifies the relocation code.

+ Fix for proper load_bias computation for relocatable executables.

Change-Id: I72502c75a70751cba324deee7d313ae61f96609e
2 files changed