build: set source dir relative to the module path (#202)

Author: ndr-brt

plugins/edc-build/build.gradle.kts

@@ -49,7 +49,8 @@ gradlePlugin {
 sourceSets {
     main {
         java {
-            srcDir(rootDir.resolve("buildSrc").resolve("build").resolve("generated").resolve("sources"))
+            val rootProjectDir = projectDir.resolve("..").resolve("..")
+            srcDir(rootProjectDir.resolve("buildSrc").resolve("build").resolve("generated").resolve("sources"))
         }
     }
 }