RISC-V: Update LP64D libm-test-ulps.

With this patch applied, I get 13 glibc testsuite failures using
TIMEOUTFACTOR=4 on a HiFive Unleashed running Fedora Core 29, using top of
tree binutils and gcc.  5 of those failures are due to a kernel bug.  Without
the patch, there are over a hundred failures.

This patch is incidentally similar to the powerpc-nofpu ulps update that
Joseph Myers added a few days ago.

	* sysdeps/riscv/rv64/rvd/libm-test-ulps: Update.