socorro-syms: Add directory arrangement needed by minidump_stackwalk

http://code.google.com/p/google-breakpad/wiki/LinuxStarterGuide



When extracting a stack trace out of a Breakpad minidump, the application
minidump_stackwalk is used. This application needs all symbol files to be
arranged in a particular directory structure in order to match the correct
symbol file with the version of the crashed program in question.

A directory structure is created in accordance with minidump_stackwalk. The
structure contains the name of the application binary and a hash value where the
hash corresponds to the binary the symbol file was produced from. The symbol
file is moved to the hash directory allowing multiple versions of the same
symbol file.

Signed-off-by: Daniel Markus <daniel.markus@leica-geosystems.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>