[Patch, fortran, RFC] PR 40958 Reduce size of module files

[Salvatore Filippone]

On a small subset of the total build, about 8-9 % of the total time, I get

trunk:  -O3
real    3m15.555s
user    2m0.572s
sys     1m12.889s

trunk   -O0:
real    3m3.014s
user    1m47.866s
sys     1m11.875s



trunk + Thomas patch  -O3 :
real    2m15.856s
user    1m47.249s
sys     0m26.944s

trunk + Thomas patch -O0
real    2m1.720s
user    1m32.932s
sys     0m26.465s


Looks like this is something useful, even though it does not solve the
size issue. Unfortunately the patch "as is" is incompatible with
Janne's one.

This is on an X86_64, different than the one for the previous measurements.
Salvatore