Fixes for example boost compile errors for m68k-nommu or arm cortex-m4. Following autobuild failures fixed: http://autobuild.buildroot.net/results/f95511e839d85ea18c5b150a59e994ef069601a1/ http://autobuild.buildroot.net/results/ff2b8be247e50c170b6317886509cc2922e1c77e/ Tested-by: Bernd Kuhls <bernd.kuhls@t-online.de> Signed-off-by: Waldemar Brodkorb <wbx@openadk.org> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>