Doesn't work on aarch64

[snorp]

The native libs on the Nexus 9 appear to be 64-bit. Or at least some of them. And this confuses jimdb currently. When attaching, I get:

gdb.error: "/Users/snorp/source/jimdb-arm/lib/HT4BAJT01519/system/bin/app_process": not in executable format: File format not recognized /Users/snorp/source/jimdb-arm/bin/../utils/gdbinit:136: Error in sourced command file: Error occurred in Python command: "/Users/snorp/source/jimdb-arm/lib/HT4BAJT01519/system/bin/app_process": not in executable format: File format not recognized

And indeed, app_process is 64-bit.

$ file lib/HT4BAJT01519/system/bin/app_process lib/HT4BAJT01519/system/bin/app_process: ELF 64-bit LSB shared object, version 1 (SYSV), dynamically linked (uses shared libs), stripped