Changeset 55b69ed in rtems for testsuites/libtests

Move default config to librtemsdefaultconfig.a

An RTEMS application default configuration is contained in
cpukit/libmisc/dummy/default-configuration.c. This default
configuration was contained in librtemscpu.a. This had at least two
problems:

1. Application configuration errors may have pulled in the default configuration which in turn lead to multiply define symbols error. This was quite confusing. You had to consult the linker map file to figure out what cased the pull in of the default configuration. You needed to know what a linker map file is and how you generate it with your build system. This was not very user friendly.

2. It prevented the use of default configuration items for each subsystem in librtemscpu.a. This may be used to reduce the size of the configuration itself.

Move the default configuration to the separate library
librtemsdefaultconfig.a.

Close #3551.