Fix incorrect check of bool returning function.
Fix incorrect check of bool returning function.

I changed elf_map_image from returning an int to returning bool.
Unfortunately, I forgot to change this one check. The result is
the relative pc of any relocation packed shared libraries is
wrong.

Bug: 21271675
Change-Id: I262e175c593d7c51f38df402f750ebf1c5c04ba7

SyndicateRogue/libunwind,SyndicateRogue/libunwind,geekboxzone/mmallow_external_libunwind,geekboxzone/mmallow_external_libunwind,geekboxzone/mmallow_external_libunwind,SyndicateRogue/libunwind