Several independent build and test failures

[Torbjörn Granlund]

1. power8-ibm-aix7.2.0.0           power8-aix.osuosl.org           32
   power8-ibm-aix7.2.0.0           power8-aix.osuosl.org-stat      32      
   power8-ibm-aix7.2.0.0           power8-aix.osuosl.org-dyn       32
   power7-unknown-linux-gnu        ppceb-debv8.gmplib.org-dyn      32
   power7-unknown-linux-gnu        ppceb-debv8.gmplib.org-stat     32

Fails for mpn_div_qr_2, written in C.

It is not clear which change could have caused this, but presumably my
update to mpn/powerpc32/p7/gmp-mparam.h.


2. pentium3-unknown-netbsdelf7.0   labrador.gmplib.org-stat     32
   pentium3-unknown-netbsdelf7.0   labrador.gmplib.org-stat-fat 32
   pentium3-unknown-netbsdelf7.0   labrador.gmplib.org-dyn-fat  32

I actually suspect hardware problems here.


3. silvermont-unknown-freebsd11.0  nshell.gmplib.org-stat-cc-c++   64
   silvermont-unknown-freebsd11.0  nshell.gmplib.org-stat-gcc-g++  64
   silvermont-unknown-freebsd11.0  nshell.gmplib.org-dyn-cc-c++    64

For some strange reason BMOD_1_TO_MOD_1_THRESHOLD is not put in
config.m4 in a few cases, causing linker errors.  I have no idea why
this happens.  There have been no source changes in this area as far as
I know.

-- 
Torbjörn
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