nmos_cl symbols for xschem updated

[KrzysztofHerman]

Fixes #594
Port order changed for xschem symbols.

[d-m-bailey]

@KrzysztofHerman Looking at the xschem documentation here, it appears that the pinnumber attribute is only used for packaged devices (tEDAx netlists, see page 54). For spice netlists, the attribute is sim_pinnumber, but that only works if all pins have a sim_pinnumber attribute (as far as I understand).
The propag attribute (explained on page 56), specifies highlighting through the device. Originally, the second pin (index 1) had propag=1 which would do nothing. With this change, when the net connected to the first pin vdd (index 0) is highlighted, the highlighting will be propagated to the pin with index 1, vss. I don't think this wanted.

I suggest removing the pinnumber and propag properties.

Note, I haven't tested any of the above, but that is my understanding from the documetation.