gcc-9 (9.3.0-12) unstable; urgency=medium
* Update to git
20200507 from the gcc-9 branch.
- Fix PR target/94613 (S390), PR tree-optimization/93674,
PR target/94145 (PPC), PR target/93654 (x86), PR c++/94946,
PR c++/90750, PR c++/79585, PR fortran/93581, PR fortran/93956,
PR fortran/94788, PR d/90718, PR d/90719.
* Increase the testsuite timeout on riscv64.
* Fix sparc64 multilib cross build (Helmut Grohne). Closes: #958909.
* lib*stdc++6: Depend on lib*gcc-sN instead if lib*gccN.
[dgit import unpatched gcc-9 9.3.0-12]