[ObjCExport] Fix extensions interface name

KT-66315

native/objcexport-header-generator/testData/headers/extensionFunctions/!extensionFunctions.h

@@ -6,7 +6,7 @@
 #import <Foundation/NSString.h>
 #import <Foundation/NSValue.h>
 
-@class Foo;
+@class ClazzA, ClazzB;
 
 NS_ASSUME_NONNULL_BEGIN
 #pragma clang diagnostic push
@@ -21,15 +21,27 @@ NS_ASSUME_NONNULL_BEGIN
 #endif
 
 __attribute__((objc_subclassing_restricted))
-@interface Foo : Base
+@interface ClazzA : Base
 - (instancetype)init __attribute__((swift_name("init()"))) __attribute__((objc_designated_initializer));
 + (instancetype)new __attribute__((availability(swift, unavailable, message="use object initializers instead")));
 - (void)memberFun __attribute__((swift_name("memberFun()")));
 @end
 
-@interface Foo (Extensions)
-- (void)extensionFunA __attribute__((swift_name("extensionFunA()")));
-- (void)extensionFunB __attribute__((swift_name("extensionFunB()")));
+__attribute__((objc_subclassing_restricted))
+@interface ClazzB : Base
+- (instancetype)init __attribute__((swift_name("init()"))) __attribute__((objc_designated_initializer));
++ (instancetype)new __attribute__((availability(swift, unavailable, message="use object initializers instead")));
+- (void)memberFun __attribute__((swift_name("memberFun()")));
+@end
+
+@interface ClazzA (Extensions)
+- (void)extensionFunA1 __attribute__((swift_name("extensionFunA1()")));
+- (void)extensionFunA2 __attribute__((swift_name("extensionFunA2()")));
+@end
+
+@interface ClazzB (Extensions)
+- (void)extensionFunB1 __attribute__((swift_name("extensionFunB1()")));
+- (void)extensionFunB2 __attribute__((swift_name("extensionFunB2()")));
 @end
 
 __attribute__((objc_subclassing_restricted))

native/objcexport-header-generator/testData/headers/extensionFunctions/Foo.kt

@@ -1,9 +1,16 @@
 fun topLevelFunA() {}
 fun topLevelFunB() {}
 
-fun Foo.extensionFunA() {}
-fun Foo.extensionFunB() {}
+fun ClazzA.extensionFunA1() {}
+fun ClazzA.extensionFunA2() {}
 
-class Foo {
+fun ClazzB.extensionFunB1() {}
+fun ClazzB.extensionFunB2() {}
+
+class ClazzA {
     fun memberFun() {}
 }
+
+class ClazzB {
+    fun memberFun() {}
+}