Some common operations include getting the parent structure of some
embedded field as well as getting "sibling" fields within the parent
structure. Add some convenience methods to the gdbmi module (as well as
wrappers in the RamDump class) for this.

Change-Id: Ic65d7e60b930af8c73384a30b6b0dd84fb55f09c

After a crash, ramdumps may be collected for analysis. The ram
parser is a tool to aid in analysis of these dumps. The script
extracts useful information from the dumps to help with debugging.
Please see the README for full details.

Change-Id: I7795686a96bbfe246edf47d09e3f616131688429