Change return type of get_load_offset to bool.
Change return type of get_load_offset to bool.

Return boolean value to indicate success and return the offset via pointer.
Offset of 0 zero is valid if the elf file was not relocated.

(cherry picked from commit 478d002e4c60c4369af35bf77da2ec64bae78649)

Bug: 21924613
Change-Id: Ia9c73673a4ecbdc1f21324b6e0f414d4daf8359d

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