Include external modifier to serialized descriptors for classes and properties

compiler/serialization/src/org/jetbrains/kotlin/serialization/DescriptorSerializer.kt

@@ -57,7 +57,7 @@ class DescriptorSerializer private constructor(
 
         val flags = Flags.getClassFlags(
                 hasAnnotations(classDescriptor), classDescriptor.visibility, classDescriptor.modality, classDescriptor.kind,
-                classDescriptor.isInner, classDescriptor.isCompanionObject, classDescriptor.isData
+                classDescriptor.isInner, classDescriptor.isCompanionObject, classDescriptor.isData, classDescriptor.isExternal
         )
         if (flags != builder.flags) {
             builder.flags = flags
@@ -170,7 +170,7 @@ class DescriptorSerializer private constructor(
 
         val flags = Flags.getPropertyFlags(
                 hasAnnotations, descriptor.visibility, descriptor.modality, descriptor.kind, descriptor.isVar,
-                hasGetter, hasSetter, hasConstant, isConst, lateInit
+                hasGetter, hasSetter, hasConstant, isConst, lateInit, descriptor.isExternal
         )
         if (flags != builder.flags) {
             builder.flags = flags

core/deserialization/src/org/jetbrains/kotlin/serialization/Flags.java

@@ -86,7 +86,8 @@ public class Flags {
             ClassKind kind,
             boolean inner,
             boolean isCompanionObject,
-            boolean isData
+            boolean isData,
+            boolean isExternal
     ) {
         return HAS_ANNOTATIONS.toFlags(hasAnnotations)
                | MODALITY.toFlags(modality(modality))
@@ -94,6 +95,7 @@ public class Flags {
                | CLASS_KIND.toFlags(classKind(kind, isCompanionObject))
                | IS_INNER.toFlags(inner)
                | IS_DATA.toFlags(isData)
+               | IS_EXTERNAL_CLASS.toFlags(isExternal)
                ;
     }
 
@@ -163,7 +165,8 @@ public class Flags {
             boolean hasSetter,
             boolean hasConstant,
             boolean isConst,
-            boolean lateInit
+            boolean lateInit,
+            boolean isExternal
     ) {
         return HAS_ANNOTATIONS.toFlags(hasAnnotations)
                | VISIBILITY.toFlags(visibility(visibility))
@@ -175,6 +178,7 @@ public class Flags {
                | IS_CONST.toFlags(isConst)
                | IS_LATEINIT.toFlags(lateInit)
                | HAS_CONSTANT.toFlags(hasConstant)
+               | IS_EXTERNAL_PROPERTY.toFlags(isExternal)
                 ;
     }