added public target-includes that provide the proper include paths fo…#2

Adding "modern cmake"-style target-includes for the static minilzo library, such that any project using this as a git submodule will automatically import the proper directories when linking to this library. This allows the parent CMakeLists.txt to simply do the following: add_subdirectory(<whereeverTheSubModuleMayBe>/lzo) .... target_link_libraries(myLib PUBLIC lzo_static_lib) include paths will then automatically get imported through the static-lib's target includes.