cmake: don't give absolute path to install()

Using aboslute path will bypass the prefix value.

Signed-off-by: Clément Péron <peron.clem@gmail.com>

Author: clementperon

CMakeLists.txt

@@ -3440,7 +3440,7 @@ if(WIN32 OR CYGWIN OR MSYS)
         endif(MSVC)
     endif(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
 else(WIN32 OR CYGWIN OR MSYS)
-    install(TARGETS ${LIBRARIES_TO_INSTALL} DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR})
+    install(TARGETS ${LIBRARIES_TO_INSTALL} DESTINATION ${CMAKE_INSTALL_LIBDIR})
 endif(WIN32 OR CYGWIN OR MSYS)
 
 install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/pcap/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/pcap)