Fix reference of wb_presets.c in POFILES.in.
wb_presets: fix 7D Mark II (#10243)

(cherry picked from commit a6ecd88e4f191683ff26101a5f855d41557a3f4a)
dt-curve-tool: add support for recording perf events in the helper
dt-curve-tool: add openmp support

Down to ~14s from ~18s for D750 24MPixels files. Most time is spent in
file format conversion anyway, but an easy saving should not be ignored.
dt-curve-tool: fix Makefile annoyance