CMakes library path cmake_install.cmake

[volga629-1]

Hello Everyone,
Can you please add, to allow library path flexibility.

  Manually-specified variables were not used by the project:

    CMAKE_INSTALL_LIBDIR

if(EXISTS "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libks.so.1" AND
     NOT IS_SYMLINK "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib/libks.so.1")

[volga629-1]

That add flexibility to detect library installation dir

if (NOT KS_PLAT_WIN)

        # Set install targets
        install(TARGETS ks COMPONENT "runtime" EXPORT LibKSConfig DESTINATION **${CMAKE_INSTALL_LIBDIR})**
        install(DIRECTORY src/include/libks COMPONENT "runtime" DESTINATION include PATTERN src/include/libks/internal EXCLUDE)

        # Set path for pkg-config based on ARCH and distro type
        if("${CMAKE_OS_NAME}" STREQUAL "Centos") # pkg-config --variable pc_path pkg-config
                if(${CPACK_SYSTEM_NAME} MATCHES "x86_64")
                        install(FILES ${PROJECT_BINARY_DIR}/libks.pc COMPONENT "runtime" DESTINATION lib64/pkgconfig)
                else()
                        install(FILES ${PROJECT_BINARY_DIR}/libks.pc COMPONENT "runtime" DESTINATION lib/pkgconfig)
                endif()
        else()
                install(FILES ${PROJECT_BINARY_DIR}/libks.pc COMPONENT "runtime" DESTINATION **${CMAKE_INSTALL_LIBDIR}**/pkgconfig)
        endif()