These functions were discarded but not provided in ROM.
Generated from commit 8ad0aa7d6 in newlib script repo. Didn't rebuild most of libc/libc_nano,
only appended the missing object files to the existing archives (should save some git churn).
Allows fcntl() implementation in vfs to be used.
Closes https://github.com/espressif/esp-idf/issues/1070
Note this is different to the other libc file-related syscalls, as there is no
reent structure involved.
- add two versions of libc: libc.a and libc_nano.a. First one has full C99 formatting support, second one uses “nano” formatting functions available in ROM.
- fix linker error for fmod, fmodf, atof, atoff
- update tests
