ghidra: restore configurability to buildGhidraExtension

This is required as Ghidra plugins don't have a consistent
layout and have to be widely configurable

pkgs/tools/security/ghidra/build-extension.nix

@@ -26,9 +26,11 @@ let
       preBuild = ''
         # Set project name, otherwise defaults to directory name
         echo -e '\nrootProject.name = "${pname}"' >> settings.gradle
+        ${args.preBuild or ""}
       '';
 
-      gradleFlags = [ "-PGHIDRA_INSTALL_DIR=${ghidra}/lib/ghidra" ];
+      gradleBuildTask = args.gradleBuildTask or "buildExtension";
+      gradleFlags = args.gradleFlags or [] ++ [ "-PGHIDRA_INSTALL_DIR=${ghidra}/lib/ghidra" ];
 
       installPhase = args.installPhase or ''
         runHook preInstall

pkgs/tools/security/ghidra/extensions/gnudisassembler/default.nix

@@ -48,6 +48,7 @@ buildGhidraExtension {
   buildInputs = [
     zlib
   ];
+  gradleBuildTask = "assemble";
 
   installPhase = ''
     runHook preInstall