The trace linker builds the both_hello example in examples-v2.
Move the various string support functions into a C++ file and stop being
inlined. Make them return const std::string.
Add ld support to rld-cc.
Add search path support to rld-config so installed common files can be used.
Fix the path bugs.
Add an absolute path function to rld-path.
The --wrapper option lets a user control the wrapper file name and
location to aid testing.
Add keep support to tempfiles so specific tempfile can be set
to be kept.
Add unlink to the rld::path namespace.
The RTEMS Trace Linker or rtems-rld creates an RTEMS executable with
trace support built in without any changes the existing code.
This commit is an initial starting point with function signatures
being read from INI files.
