Document failure to build the uClibc cross-ldd under Cygwin as a known issue.

/trunk/docs/known-issues.txt | 16 15 1 0 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

 # Compute IA-64-specific values

 CT_DoArchTupleValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }