Fix a bug in the Common CMakeLists file

We were overwriting the LIBS variable. Effectively dropping libiconv from the libs.

Source/Core/Common/CMakeLists.txt

@@ -42,7 +42,7 @@ else()
 	         Logging/ConsoleListenerNix.cpp)
 endif()
 
-set(LIBS enet)
+list(APPEND LIBS enet)
 if(_M_ARM_64)
 	set(SRCS ${SRCS}
 	         Arm64Emitter.cpp
@@ -60,9 +60,9 @@ else()
 	endif()
 endif()
 
-set(LIBS "${CMAKE_THREAD_LIBS_INIT}" ${VTUNE_LIBRARIES})
+list(APPEND LIBS "${CMAKE_THREAD_LIBS_INIT}" ${VTUNE_LIBRARIES})
 if(NOT APPLE AND NOT ANDROID)
-	set(LIBS ${LIBS} rt)
+	list(APPEND LIBS rt)
 endif()
 
 # OpenGL Interface