Added the ability to have GDB formats appended to any command so you can do

things like:

(lldb) x/32xb 0x1000

"x" is an alias to "memory read", so this will actually turn into:

(lldb) memory read --gdb-format=32xb 0x1000

This applies to all commands, so the GDB formats will work with "register read",
"frame variable", "target variable" and others. All commands that can accept
formats, counts and sizes have been modified to support the "--gdb-format"
option.

llvm-svn: 143230