gyp generated Makefile says:
The implicit make rules have it looking for RCS files, among other things.
We instead explicitly write all the rules we care about.
It's even quicker (saves ~200ms) to pass -r on the command line.
-Dlinux_use_gold_binary=0 \
-Dlinux_use_gold_flags=0
-%{__make} chrome %{?with_sandboxing:chrome_sandbox} \
+%{__make} -r chrome %{?with_sandboxing:chrome_sandbox} \
BUILDTYPE=%{!?debug:Release}%{?debug:Debug} \
%{?with_verbose:V=1} \
CC="%{__cc}" \