Tests: Extend ObjectLibrary test with case for object lib dependencies

Add the test case from commit bab24e782c (target_link_libraries:
Propagate dependencies of object libraries, 2018-12-10,
v3.14.0-rc1~260^2) to the main ObjectLibrary test.

Tests/ObjectLibrary/CMakeLists.txt

@@ -73,3 +73,5 @@ add_executable(UseABstaticObjs $<TARGET_OBJECTS:UseABstatic>)
 target_link_libraries(UseABstaticObjs ABstatic)
 
 add_subdirectory(ExportLanguages)
+
+add_subdirectory(Transitive)

Tests/ObjectLibrary/Transitive/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_policy(SET CMP0022 NEW)
+add_library(FooStatic STATIC FooStatic.c)
+
+add_library(FooObject1 OBJECT FooObject.c)
+target_link_libraries(FooObject1 PRIVATE FooStatic)
+add_executable(Transitive1 Transitive.c)
+target_link_libraries(Transitive1 PRIVATE FooObject1)

Tests/ObjectLibrary/Transitive/FooObject.c

@@ -0,0 +1,4 @@
+int FooObject(void)
+{
+  return 0;
+}

Tests/ObjectLibrary/Transitive/FooStatic.c

@@ -0,0 +1,4 @@
+int FooStatic(void)
+{
+  return 0;
+}

Tests/ObjectLibrary/Transitive/Transitive.c

@@ -0,0 +1,7 @@
+extern int FooObject(void);
+extern int FooStatic(void);
+
+int main(void)
+{
+  return FooObject() + FooStatic();
+}