On some hosts (eg. Cygwin), it's not possible to build the uClibc hostutils. Offer an option to enable/disable the uClibc hostutils build.

/trunk/scripts/build/libc/uClibc.sh | 39 12 27 0 ++++++++++++---------------------------
/trunk/config/libc/uClibc.in | 10 10 0 0 ++++++++++
2 files changed, 22 insertions(+), 27 deletions(-)

 # x86_64 specific options

 config ARCH_x86_64

     select ARCH_64

     select ARCH_SUPPORT_ARCH

     select ARCH_SUPPORT_CPU

     select ARCH_SUPPORT_TUNE

     help

       The x86_64 architecture, as defined by:

         http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_875_7044,00.html