Refreshes due to these upstream commits:
* bd9c550acc
* e22962538f
* 1f05dfc131
enable libstdcxx-backtrace to match our mingw build
remove unused _targets var
* 0950-11.2.0-configure-msys2.patch: replace with building for cygwin
(the lto plugin DLL name changed, which we could patch back if it is a problem)
* 0951-11.2.0-msys2-spec.patch: not relevant for mingw
* 0953-11.2.0-testsuite-msys2.patch: not relevant for mingw
* sync in patches from cygwin gcc
* sync in important patches from mingw gcc not related to the build
* enabling stripping (not sure why it was disabled)
* reduce diff for build options to the mingw gcc build a bit
In some cases this will introduce cycles which could likely be cleaned
up by only depending on some unix tools instead of the whole autotools.
Rebuilding doesn't make much sense at this point since it just adds a subset
of base-devel which is still installed by default.
gawk – 4.2.0-1 - Update to latest 4.2.0 version, remove unnecessary patch, rebuild with MPRF 4.0.0.1-3
gcc – 6.4.0-2 – rebuild 6.4.0 with isl 0.18, mpc 1.1.0-1 and mpfr 4.0.0.1-3
isl - 0.18-1 – Update to 0.18 version 4.0.0.1-3
Mingw-w64-crt-git – Update to latest mingw-w64 from git
mingw-w64-gcc – 6.4.0-2 – Update to gcc 6.4.0 – rebuild with isl 0.18-1 and mfpr 4.0.0.1-3. Skipped 1 rev to match gcc 6.4.0-2
mingw-w64-headers-git – Update to latest mingw-w64 from git
mingw-w64-tools-git – Update to latest mingw-w64 from git
mingw-w64-winpthreads-git – Update to latest mingw-w64 from git
mingw-w64-winstorecompat-git – Update to latest mingw-w64 from git
mpc – 1.1.0-1 – Update to mpc 1.1.0
mpr - 4.0.0.1-3 – Update to mpfr 4.0.0.1 – added workaround for issue I described above, rekey patches
msys2-w32api-headers-git – Update to latest mingw-w64 from git
msys2-w32api-runtime-git – Update to latest mingw-w64 from git
* upgrade some broken packages
* correct some broken urls/checksums
* use secure urls where possible
* use stable url for ncurses
* some whitespace fixes
Remaining md5sums either didn't download or
didn't pass checksum tests.
