Squashed commit of the following:
libs/libxx: Fix some confusing in naming. If the directory is called libxx, then the library must be libxx.a (unless perhaps LIBCXX is selected).
libs/: Fix paths in moved library directories.
libs: Brute force move of libc, libnx, and libxx to libs. Cannot yet build it in that configuration.
The sign of integral part given by the modf() should be same as sign of input.
But for inputs between 0 and 1, the sign of integral part was not same as sign of input.
Signed-off-by: Lokesh B V <lokeshbv333@gmail.com>
