Disable dynamic types being on by default until kinks get worked out when

they don't update correctly. Currently if a variable is unavailable due to
a register not being available in a higher frame or due to the PC value
not being a valid location list value, "<unknown type>" will get displayed
as the variable type. I am not sure what other things will fail, so I am 
disabling it for now just by letting the default enumeration value default
to it being disabled.

llvm-svn: 132303