support adb-gdb for android

**Is your feature request related to a problem? Please describe.**
No

**Describe the solution you'd like**
I use adb-gdb command to debug chromium codes, and it's in chromium build source tree, build/android/adb-gdb

**Describe alternatives you've considered**
let gdbgui support this easy script for android application debug.

**Additional context**
N/A