simpleperf: fix symbolization in multi-executable-segments libraries.

simpleperf: fix symbolization in multi-executable-segments libraries.

Apps may run with libraries with multiple executable segments.
Symbolization ip addresses in these libraries need to use map.pgoff.

The old formula converting ip to vaddr_in_file:
  vaddr_in_file = ip - map.start + min_executable_vaddr

The new formula converting ip to vaddr_in_file:
  offset_in_file = ip - map.start + map.pgoff
  vaddr_in_file = offset_in_file - file_offset_of_min_executable_vaddr
		  + min_executable_vaddr

Bug: 124056476
Test: run simpleperf_unit_test.
Test: use simpleperf to profile facebook app, ip addresses hitting libc.so
Test: and libart.so are symbolized correctly.
Change-Id: I5fd3ed822a916c4d04a9868d6d209c43ee190c5b