libevhtp: update to 1.2.15.
libevhtp: update to 1.2.15.

Closes: #9829 [via git-merge-pr]

NeoChontrix/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,floGik/void-packages,floGik/void-packages,necrophcodr/void-packages,floGik/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,coredumb/void-packages,floGik/void-packages,coredumb/void-packages,coredumb/void-packages,coredumb/void-packages,coredumb/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,floGik/void-packages,floGik/void-packages,necrophcodr/void-packages,coredumb/void-packages,necrophcodr/void-packages