Android NDK r22 (7026061)
Update GDB to properly handle DWARF v5 format. Minimum updates to add proper handling for DWARF v5. Test: built gdb, ran gdb on 4 variants of test program: dwarf4 with dwo files; dwarf4 with .dwp file; dwarf5 with dwo files; dwarf5 with dwp file. Change-Id: Ibf752386adb14b7bf4e60d8ec79851f29bf17e11