Fix lz4 dependency...

after snappy was replaced by lz4 in the platform (see the previous commit
with related test for the more info)

compiler/compiler.pro

@@ -47,7 +47,6 @@ messages/**)
 -dontwarn javax.crypto.**
 -dontwarn java.lang.invoke.MethodHandle
 -dontwarn org.jline.builtins.Nano$Buffer
--dontwarn net.jpountz.lz4.LZ4Factory
 -dontwarn org.jetbrains.annotations.ReadOnly
 -dontwarn org.jetbrains.annotations.Mutable
 -dontwarn com.intellij.util.io.TarUtil
@@ -216,3 +215,5 @@ messages/**)
 
 # remove when KT-18563 would be fixed
 -keep class org.jetbrains.kotlin.psi.psiUtil.PsiUtilsKt { *; }
+
+-keep class net.jpountz.lz4.* { *; }