default link freetype in linux platform

examples/HelloFreeType/proj.cmake/CMakeLists.txt

@@ -17,4 +17,4 @@ if (WIN32) #disable console mode for VC++
 	set_target_properties(HelloFreeType PROPERTIES WIN32_EXECUTABLE TRUE)
 endif(WIN32)
 
-target_link_libraries(HelloFreeType ${OXYGINE_CORE_LIBS} ${OXYGINE_FREETYPE_LIBS} oxygine-freetype)
+target_link_libraries(HelloFreeType ${OXYGINE_CORE_LIBS} ${OXYGINE_FREETYPE_LIBS} oxygine-freetype freetype)

examples/HelloFreeType/proj.cmake/README.md

@@ -0,0 +1,6 @@
+## Linux 
+you need install freetype package.
+for example Ubuntu 16.04
+```
+sudo apt-get install libfreetype6-dev
+```