treewide: add dontUseImakeConfigure where needed

We need to set dontUseImakeConfigure in a few places to prevent imake
from overriding the default configure phase. This packages all have a
configure script that needs to get run:

- Xaw3d
- R
- tkgate
- ssvnc

pkgs/applications/networking/remote/ssvnc/default.nix

@@ -12,7 +12,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ imake zlib jdk libX11 libXt libXmu libXaw libXext libXpm openjpeg openssl ];
 
-  configurePhase = "makeFlags=PREFIX=$out";
+  dontUseImakeConfigure = true;
+
+  makeFlags = "PREFIX=$(out)";
 
   hardeningDisable = [ "format" ];