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It looks like there is a bug in leon2-emu because running this test with a
range of 10000 leads to the emulator getting stuck on a particular
instruction.  The PC is 400397b4 in the code below and that indicates that
the write to PSR is problematic.  The code seems to be within the RTEMS
task switching routine.

400397a4:       81 8c 00 00     mov  %l0, %psr
400397a8:       01 00 00 00     nop
400397ac:       01 00 00 00     nop
400397b0:       01 00 00 00     nop
400397b4:       a9 50 00 00     rd  %wim, %l4

Main changes:
- ujson module is removed due to uio requirements
- _collections is renamed to ucollections
- global variables are preallocated for no-heap tests
- dict1 is made deterministic when printing dicts
- dict_copy uses less memory
- leon_t1/ROB_ tests are adjusted because they are finicky