Fix rootDir mis-use in commonConfiguration.gradle:

replace with `kotlin_root`, that is set in the projects

libraries/build.gradle

@@ -1,4 +1,5 @@
 buildscript {
+    ext.kotlin_root = "$rootDir/.."
     apply from: 'versions.gradle'
 
     repositories {

libraries/commonConfiguration.gradle

@@ -9,8 +9,8 @@ ext {
     JDK_16 = jdkPath("1.6")
     JDK_17 = jdkPath("1.7")
     JDK_18 = jdkPath("1.8")
-    distDir = file("${rootDir}/../dist")
-    distLibDir = file("${rootDir}/../dist/kotlinc/lib")
+    distDir = file("$kotlin_root/dist")
+    distLibDir = file("$kotlin_root/dist/kotlinc/lib")
     bootstrapCompilerFile = file("$distDir/kotlin-compiler-for-maven.jar")
 }
 

libraries/tools/gradle-tools/build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_root = findProperty("kotlinRoot") ?: "${rootProject.projectDir}/../../.."
+    ext.kotlin_root = "$rootDir/../../.."
     apply from: "${kotlin_root}/libraries/versions.gradle"
 
     repositories {