Adds support for compiling fakeroot under time64 flags, effectively making struct stat and stat64 time64 variants.
On archs where time_t would natively be 32-bit, the glibc headers add assembler-level symbol aliases which prevent us from redefining the symbols _if_ the glibc headers are included. Moves our own symbol definitions into a new translation unit which does not use the glibc headers.
Adds debug messages in a few helpful places.
Probably not compatible with earlier glibc versions.
You still cannot mix classic/LFS/t64 ABIs in one fakeroot session with this.
