Improve linking for prototype1.

The creational_patterns library is required for the prototype library,
but this was not specified yet.  It is now added as a PUBLIC link
library for prototype and because of that, we no longer need to specify
it as a linker library for prototype1.

Creational_Patterns/Prototype/CMakeLists.txt

@@ -3,7 +3,8 @@ set(prototype_SRCS
 
 add_library(prototype SHARED ${prototype_SRCS})
 target_include_directories(prototype PUBLIC ..)
+target_link_libraries(prototype PUBLIC creational_patterns)
 
 add_executable(prototype1 prototype1.cpp)
 
-target_link_libraries(prototype1 prototype creational_patterns)
+target_link_libraries(prototype1 PRIVATE prototype)