Compile client-common with consistent CFLAGS
Compile client-common
with consistent CFLAGS
-
otherwise debuginfo will vary across builds
depending on how parallel make scheduled compilations.
See https://reproducible-builds.org/ for why this matters.
This patch was done while working on reproducible builds for openSUSE.
Q: should we drop the duplicated rules from gpomme/Makefile wmpomme/Makefile ?