Ensure absolute paths are written to module xml file

Since d0ca0dca2b
first IC build uses CompilationMode.Rebuild instead of Incremental
to avoid unnecessary work (computing API difference etc.).

However there is a branch that does not transform source files
paths to absolute ones before writing them to module xml file.

In our plugins we have always transformed files to absolute ones before
passing them to IncrementalJvmCompilerRunner, so there is no problem.

But third party build systems could pass relative paths to IncrementalJvmCompilerRunner
(namely Kobalt does so).
It turned out to break builds because KotlinToJVMBytecodeCompiler takes
module xml file's (which is a temporary file itself) parent as a base
for relative source files (see KotlinToJVMBytecodeCompiler.getAbsolutePaths).

This change ensures that makeModuleFile always uses absolute files.

    #KT-22542 fixed

build-common/src/org/jetbrains/kotlin/incremental/buildUtil.kt

@@ -47,7 +47,10 @@ fun makeModuleFile(
     builder.addModule(
             name,
             outputDir.absolutePath,
-            sourcesToCompile,
+            // important to transform file to absolute paths,
+            // otherwise compiler will use module file's parent as base path (a temporary file; see below)
+            // (see org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.getAbsolutePaths)
+            sourcesToCompile.map { it.absoluteFile },
             javaSourceRoots,
             classpath,
             null,