/usr/bin/ is in mingw32-binutils 2.25-5+5.2+deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/bin/i586-mingw32msvc-size
/usr/bin/i586-mingw32msvc-strings
/usr/bin/i586-mingw32msvc-windres
/usr/bin/i586-mingw32msvc-objcopy
/usr/bin/amd64-mingw32msvc-addr2line
/usr/bin/amd64-mingw32msvc-windres
/usr/bin/i586-mingw32msvc-ld
/usr/bin/i586-mingw32msvc-addr2line
/usr/bin/amd64-mingw32msvc-objcopy
/usr/bin/amd64-mingw32msvc-ranlib
/usr/bin/amd64-mingw32msvc-windmc
/usr/bin/i586-mingw32msvc-ar
/usr/bin/i586-mingw32msvc-readelf
/usr/bin/amd64-mingw32msvc-nm
/usr/bin/amd64-mingw32msvc-dlltool
/usr/bin/i586-mingw32msvc-objdump
/usr/bin/i586-mingw32msvc-gprof
/usr/bin/amd64-mingw32msvc-strings
/usr/bin/i586-mingw32msvc-windmc
/usr/bin/i586-mingw32msvc-dlltool
/usr/bin/amd64-mingw32msvc-gprof
/usr/bin/amd64-mingw32msvc-ar
/usr/bin/i586-mingw32msvc-strip
/usr/bin/i586-mingw32msvc-nm
/usr/bin/i586-mingw32msvc-ranlib
/usr/bin/amd64-mingw32msvc-size
/usr/bin/amd64-mingw32msvc-objdump
/usr/bin/i586-mingw32msvc-c++filt
/usr/bin/amd64-mingw32msvc-as
/usr/bin/amd64-mingw32msvc-strip
/usr/bin/amd64-mingw32msvc-readelf
/usr/bin/i586-mingw32msvc-as
/usr/bin/i586-mingw32msvc-dllwrap
/usr/bin/amd64-mingw32msvc-c++filt
/usr/bin/amd64-mingw32msvc-ld
/usr/bin/amd64-mingw32msvc-dllwrap