add workload traces for missing functions (double format)

This patch adds workload traces for all double format functions where such
files are missing.  For each function, a set of 1000 random values is
generated at random using SageMath, such that the output values are
meaningful (for example avoiding too large inputs for exp10 where the
output would be +Inf).  More details about the generated values are
given at the beginning of each file.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>