[PD] iemlib abs small bugs

[Anders Friberg]

Hi all,
I found a couple of small details in the (otherwise great!) iemlib 
abstraction collection which I think can easily be fixed.
I am using pd-extended 38.4 so maybe it is fixed more recent versions:

The "vcf_lp2~" abstraction is using "iem_cot~" which does not exist. I 
suppose it should be changed to "iem_cot4~" instead?
The "vcf_bp2~" abstractions doesn't work - replace "vcf_filter~ rbp" 
with "vcf_filter~ bp2"  or "vcf_filter~ rbp2"?

The rest of the filters seems to be ok although I haven't gone through 
all of them (quite a few!)
It is easy to make a workaround by saving them at the same place as the 
patch that are calling them.
Should I put it in the bug list?
Best,
Anders