ogc: add libogc link flags to pkg-config file (#52)

Author: mardy

CMakeLists.txt

@@ -2942,6 +2942,11 @@ elseif(OGC)
     list(INSERT SDL_LIBS 0 "-lSDL2main")
     list(APPEND EXTRA_LIBS "fat")
   endif()
+  list(APPEND EXTRA_LDFLAGS "${OGC_ARCH_SETTINGS} ${OGC_LINKER_FLAGS}")
+  if(NINTENDO_WII)
+    list(APPEND EXTRA_LIBS "wiiuse;bte")
+  endif()
+  list(APPEND EXTRA_LIBS "ogc;m")
 endif()
 
 if(HAVE_VULKAN AND NOT SDL_LOADSO)