re-ordering makefile caused lib.version to not be included in c.flags

[sebshader]

because lib.version is now (as of commit a6975e9 I think) evaluated after cflags are passed to c.flags, it doesn't make it into c.flags that rely on it (such as -DVERSION in zexy)
(I wrote a comment in the commit but not sure if anyone would see it)

[umlaeute]

good catch.

it seems that a fix is to move the variables: library name and version section to the top of the Makefile (i put it right after Makefile.pdlibbuilder = true and the target platform detection.

this is probably a safe place, as i think that these variables are "static" (as in: not hacked upon by pd-lib-builder users), and they are expanded simply (as in non-recursively) anyhow.

there's probably an even better place, i haven't looked far.

@katjav i guess the "nice structure" of the Makefile.pdlibbuilder needs to be re-evaluated.
probably it is enough to split into a first part that only deals with simply expanded variables, and a 2nd part to deal with recursively expanded vars.

that is, instead of:

# general foo
# target platform detection
# per-platform vars
# files
# checks
# ...

we probably need something like:

# simply expanded vars
## general foo
## target platform detection
## per-platform vars
## files
## checks
## ...
# recursively expanded vars
## general foo
## target platform detection
## per-platform vars
## files
## checks
## ...