First set of stdc changes for Android
Fix formatting
Remove OS comments
Port types, add version(X86) blocks, and start fixing fpos_t
Add fpos_t to all OS blocks, fix it later
Fix up stdc.stdio a bit
Keep _iobuf around until not needed in std.stdio
Fix function types and typo
Use c_long/c_ulong instead
No strtold on Android, so use strtod instead