Update double-conversion to version 3.1.6 / rev 10 via SR 935947
https://build.opensuse.org/request/show/935947
by user pgajdos + dimstar_suse
- update to 3.1.6:
* Features some code cleanups.
* Adds the following new architectures: loongarch, xtensa, nios2, e2k. (forwarded request 935845 from dirkmueller)