- Update to gcc-7-branch head (r247368)
* Includes GCC 7.1 RC2
* Includes ARM ABI fix for PR77728, fixing ABI incompatibility
with GCC 4.8.

- Update to gcc-7-branch head (r247019).
- Always create nvptx offloading cross spec file.
- Fix libada provides/conflicts.
- Package gcov.h.
- Add #!BuildIgnore: gcc-PIE.
- Fix update-alternatives.

- Add update-alternatives for binaries produces by cross compilers.
- Add nospeccleaner comment, remove legacy norootforbuild and
icecream.

- Update to gcc trunk head (r246609).
- Add cross-binutils Requires to cross-gcc packages.

- Really fix libtsan requirement on ppc. [boo#1030623]
- Also fix liblsan requirement on pcc.

- Update to gcc trunk head (r246414).
- Package gcov-dump.
- Remove gcc7-debug-dwarf2out-ice.patch.
- Add gcc7-remove-Wexpansion-to-defined-from-Wextra.patch to remove
useless warning from Wextra that causes build fails due to excessive
log file size.
- Remove libtsan Requires from the gcc7-32bit package, tsan doesn't have
a 32bit multilib on any arch. [boo#1030623]