--checksize no longer working for >= 4.17

[FAMILIAR-project]

python3 kernel_generator.py --dev 1 --linux_version 4.17 --tiny --checksize

with an error (non-blocking):
size: '/TuxML/linux-4.17/*/built-in.o': No such file
and similar observations for 4.20 or 5.x

4.16 version seems to work fine!

the cause is there:

## retrieve_sizes
# @author SAFFRAY Paul
# @version 1
# @brief Retrieve the additional sizes with more specific commands
def retrieve_sizes(path):
    sizes_result = {}
    sizes_result['size_vmlinux'] = subprocess.run(['size {}/vmlinux'.format(path)], shell=True, stdout=subprocess.PIPE).stdout.decode('utf-8')
    sizes_result['nm_size_vmlinux'] = bz2.compress(
                                    subprocess.run(["nm --size -r {}/vmlinux | sed 's/^[0]*//'".format(path)], shell=True, stdout=subprocess.PIPE).stdout)
    sizes_result['size_builtin'] = bz2.compress(
                                    subprocess.run(['size {}/*/built-in.o'.format(path)], shell=True, stdout=subprocess.PIPE).stdout)
    return sizes_result

it seems related to this change:
https://gitlab.javinator9889.com/Javinator9889/thdkernel/commit/f49821ee32b76b1a356fab17316eb62430182ecf
and discussions:
https://patchwork.kernel.org/patch/10210515/
https://patchwork.kernel.org/patch/10210517/

basically we need to have a look at built-in.a instead of built-in.o

I will try to fix this issue with a conditional on version number...

[FAMILIAR-project]

now working: 96f6543

python3 kernel_generator.py --dev 1 --tiny --linux_version 5.1 --checksize --local

 text	   data	    bss	    dec	    hex	filename
  1871	      8	      8	   1887	    75f	/TuxML/linux-5.1/drivers/char/mem.o (ex /TuxML/linux-5.1/drivers/built-in.a)
  6100	    761	    792	   7653	   1de5	/TuxML/linux-5.1/drivers/char/random.o (ex /TuxML/linux-5.1/drivers/built-in.a)
  1030	     56	     16	   1102	    44e	/TuxML/linux-5.1/drivers/char/misc.o (ex /TuxML/linux-5.1/drivers/built-in.a)
  2082	     56	      0	   2138	    85a	/TuxML/linux-5.1/drivers/base/component.o (ex /TuxML/linux-5.1/drivers/built-in.a)
  7915	    296	     56	   8267	   204b	/TuxML/linux-5.1/drivers/base/core.o (ex /TuxML/linux-5.1/drivers/built-in.a)

also working with 4.17 (and non-regression with 4.13.3 and 4.15)