Add missing nostalgia directory level in src tree

src/nostalgia/core/CMakeLists.txt

@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 2.8.11)
+
+if(WOMBAT_BUILD_TYPE STREQUAL "GBA")
+	enable_language(C ASM)
+	set(
+		CPP
+			gba/gfx.cpp
+			gba/media.cpp
+	)
+elseif(WOMBAT_BUILD_TYPE STREQUAL "Native")
+	set(CMAKE_INCLUDE_CURRENT_DIR ON)
+	set(CMAKE_AUTOMOC ON)
+
+	set(
+		CPP
+			qt/gfx.cpp
+	)
+endif()
+
+add_library(
+	NostalgiaCore
+		${CPP}
+		core.cpp
+)
+
+install(
+	FILES
+		core.hpp
+		gfx.hpp
+		gba/gba.hpp
+	DESTINATION
+		include/nostalgia/core
+)