tests/libc_newlib: add test for newlib-nano inclusion [backport 2018.07] #9633
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Backport of #9599
Contribution description
This test verifies that when used, newlib-nano is correctly included, both
header and also linked.
This is a standalone test and is less invasive than doing a global test like what I tried in #9512
I want to use it to debug non handled developers computers.
Testing
I tested the following setups:
Issues/PRs references
#9512
This should not be merged before #9398 as currently llvm is not handled properly but it should not block adding tests in murdock.I now think it should be included before #9398, I thought it would be all fixed faster.
I already have a fix for the llvm/clang issue #9513