Fix compilation warnings in 'pill-importer' project

These warnings have fail compilation with bootstrap.

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/KotlinArtifactsDSLCodegen.kt

@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode
 import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import java.io.File
+import java.util.*
 
 fun main() {
     generateAbstractKotlinArtifactsExtensionImplementation()
@@ -58,9 +59,9 @@ private fun generateAbstractKotlinArtifactsExtensionImplementation() {
         val name = nameParts.drop(1).joinToString(
             separator = "",
             prefix = nameParts.first(),
-            transform = String::capitalize
+            transform = String::capitalizeUS
         )
-        "val $name = KonanTarget.${it.name.toUpperCase()}"
+        "val $name = KonanTarget.${it.name.uppercase(Locale.US)}"
     }.indented(4)
 
     val code = listOf(

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/kpmNativeVariantCodegen.kt

@@ -9,6 +9,7 @@ package org.jetbrains.kotlin.generators.gradle.dsl
 
 import org.jetbrains.kotlin.konan.target.KonanTarget
 import org.jetbrains.kotlin.konan.target.presetName
+import java.util.*
 import kotlin.io.path.ExperimentalPathApi
 import kotlin.io.path.Path
 import kotlin.io.path.writeText
@@ -96,7 +97,7 @@ private fun allVariantConstructors() = allKonanTargets()
 
 private val KonanTarget.variantClassName
     get() = presetName
-        .capitalize()
+        .capitalizeUS()
         .let { "Kotlin${it}Variant" }
 
 private val KonanTarget.className get() = javaClass.simpleName

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/mppNativeBinaryDSLCodegen.kt

@@ -33,8 +33,8 @@ private fun binaryType(
         typeName("$MPP_PACKAGE.$className"),
         typeName("${nativeOutputKindClass.fqName}.$outputKind"),
         baseMethodName,
-        "get${baseMethodName.capitalize()}",
-        "find${baseMethodName.capitalize()}",
+        "get${baseMethodName.capitalizeUS()}",
+        "find${baseMethodName.capitalizeUS()}",
         defaultBaseName
     )
 

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/stringUtils.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.generators.gradle.dsl
+
+import java.util.*
+
+fun String.capitalizeUS() = replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.US) else it.toString() }