More precisely, it was introduced here 6c7bc562

bug1: Soc2cGenAssign.f was calling Soc2cIdent.type_to_short_string,
which was generating bad idents (ie, containing "::").

bug2 : some _assign_array_types macro def were missing.

to be continued...

i.e., by providing a default macro definition that uses memcpy()
(versus generating a nop function).

nb : the -exec mode was working because I did not use the generated soc,
which was completely wrong.

Note that to do that, I have modified the CURRENT variant of
Lic.val_exp, to attach it the clock the current holds on. Indeed, the
clock is mandatory to generated correct code...

In an ideal world, this clock information may have explicitely been
set by the user ("current(clk_of_X,X)" instead of "current(X)"), but
for historical reason, it is not the case.

Hence, this information is added as soon as it is available, namely,
during clock checking.

# of unexpected failures	101->109

but actually, some new test passes causes several other failing test
to be tried, so it is not really a regression.

Indeed, ite are polymorphic, and thus inventing names during soc
instanciation is error-prone, ugly, innefficient, and increase the
code size.

Moreover, using C ite to translate them online (ie, without going
trough a soc) is straigforward

# of unexpected failures	104->101.

where I've removed the handling of polymorphism.

For instance,
  node toto = map<<Lustre::if,  N>>(x, a, b);
is rejected.

The problem with this change is that we now also reject equations such as
   res = map<<+,  N>>(x, a, b);

which could be avoided. Probably L2lRmPoly does its job partially.

The first one in Soc2cIdent.type_to_short_string when enum and int were both
translated by "i" ; as a consequence, some different soc ctx get the same name.

The second one was due to the fact that car ident in gao switches were
printed incorrectly (missing "ctx->" or "node_no_mem_ctx.").

nb:  unexpected failures 162-> 149

nb:  unexpected failures 175-> 162

Also name step function consistent and uniquely

test: 238->203 failures

Also do not crash if the soc contains reference to extern types.

of expected passes		1073 -> 1116
of unexpected failures	325 -> 282

- Generate code for most predef operators.
- Generate a loop.c file (in a similar manner as ec2c -loop does)