Don't wrap ProcessCanceledException with other exceptions

ProcessCanceledException indicates that the compilation process was
terminated by user. This kind of exception should not be wrapped anyhow
in order to be handled on toplevel in CLICompiler.
#KT-38483 Fixed

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/CompilationException.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.backend.common
 
+import com.intellij.openapi.progress.ProcessCanceledException
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
@@ -96,13 +97,16 @@ fun Throwable.wrapWithCompilationException(
     message: String,
     file: IrFile,
     element: IrElement?
-): CompilationException {
-    return CompilationException(
-        "$message: ${this::class.qualifiedName}: ${this.message}",
-        file,
-        element,
-        cause = this
-    ).apply {
-        stackTrace = this@wrapWithCompilationException.stackTrace
-    }
+): RuntimeException {
+    return if (this is ProcessCanceledException)
+        this
+    else
+        CompilationException(
+            "$message: ${this::class.qualifiedName}: ${this.message}",
+            file,
+            element,
+            cause = this
+        ).apply {
+            stackTrace = this@wrapWithCompilationException.stackTrace
+        }
 }