Re-Revert "Merge #101508: libraw: 0.20.0 -> 0.20.2"

This reverts commit c778945806.

I believe this is exactly what brings the staging branch into
the right shape after the last merge from master (through staging-next);
otherwise part of staging changes would be lost
(due to being already reachable from master but reverted).

pkgs/stdenv/darwin/default.nix

@@ -190,10 +190,7 @@ in rec {
 
   stage1 = prevStage: let
     persistent = self: super: with prevStage; {
-      cmake = super.cmake.override {
-        isBootstrap = true;
-        useSharedLibraries = false;
-      };
+      cmake = super.cmakeMinimal;
 
       python3 = super.python3Minimal;