Build: disable jar compression for local builds

This speeds ups jar creation twice, which is significant for local
incremental builds when jar creation can dominate compilation time.

Changes in stripMetadata are required because putting entry from not-stripped
jar caused failures when compression was disabled (because size and crc
are actually changed during metadata removal; don't know why it works
with compression).

build.gradle.kts

@@ -378,6 +378,7 @@ if (!isTeamcityBuild) {
                  when (task) {
                      is AbstractKotlinCompile<*> -> task.incremental = true
                      is JavaCompile -> task.options.isIncremental = true
+                     is org.gradle.jvm.tasks.Jar -> task.entryCompression = ZipEntryCompression.STORED
                  }
             }
         }

buildSrc/src/main/kotlin/stripMetadata.kt

@@ -6,6 +6,7 @@ import java.io.BufferedOutputStream
 import java.io.File
 import java.io.FileOutputStream
 import java.util.jar.JarFile
+import java.util.zip.ZipEntry
 import java.util.zip.ZipOutputStream
 
 /**
@@ -47,8 +48,8 @@ fun stripMetadata(logger: Logger, classNamePattern: String, inFile: File, outFil
                     error("Size increased for ${entry.name}: was ${inBytes.size} bytes, became ${outBytes.size} bytes")
                 }
 
-                entry.compressedSize = -1L
-                outJar.putNextEntry(entry)
+                val newEntry = ZipEntry(entry.name)
+                outJar.putNextEntry(newEntry)
                 outJar.write(outBytes)
                 outJar.closeEntry()
             }