Fix parsing of parent information
Fix parsing of parent information

It seems that the way rtags reports the parent location has changed
since that code was last updated. The --symbol-info-include-parents -U
command now reports parent information like this:

    SymbolName: foobar
    Kind: ...
    Type: ...
    SymbolLength: ...
    Range: ...
    sizeof: ...
    Alignment: ...
    Arguments: ...
    Parent: path:line:col:	void Class::method() {

Signed-off-by: David Wagner <60228a510f9a76940848fa2d29321fc4edfc2119@easymile.com>

lyuts/vim-rtags