s-tar: force '-std=c89' so it builds with recent compilers (#436514)

Changed files
+1
pkgs
by-name
s-
s-tar
+1
pkgs/by-name/s-/s-tar/package.nix
···
preConfigure = "rm configure";
preBuild = "sed 's_/bin/__g' -i RULES/*";
makeFlags = [ "GMAKE_NOWARN=true" ];
+
env.NIX_CFLAGS_COMPILE = "-std=c89";
installFlags = [
"DESTDIR=$(out)"
"INS_BASE=/"