Bug#866354: Breaks for the armel libstdc++ symbol version changes

[Adrian Bunk <bunk@debian.org>]

Control: reopen -1
Control: tags -1 buster sid

The following breaks are needed to handle the moved symbols from the
pr64735 fix in gcc-6 in stretch->buster upgrades on armel:

dnsdist (<< 1.3.3-3)
lambda-align (<< 1.0.3-5)
libllvm3.8
libllvm3.9
libllvm4.0
mednafen (<< 1.22.1+dfsg-1)
nghttp2-proxy (<< 1.36.0-2)
osm2pgsql (<< 0.96.0+ds-2)
osmcoastline (<< 2.2.4-1)
osmium-tool (<< 1.10.0-1)
pdns-recursor (<< 4.1.11-1)
poedit (<< 2.2.1-2)
python-pyosmium (<< 2.15.1-1)
python3-pyosmium (<< 2.15.1-1)
seer (<< 1.1.4-2)
libsimgrid3.14
undertaker (<< 1.6.1-4.2)
libusbguard0 (<< 0.7.4+ds-1)

This does intentionally break << the version in buster/unstable,
for also breaking versions of these packages in stretch-backports.

The LLVM and libsimgrid3.14 breaks are unversioned since these versions 
are not in buster (or any future Debian release).

Thanks
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed