t/30-tcc-test-suite.t fails on some linux systems

[eserte]

On my Ubuntu 18.04 smoker the test suite fails:

In file included from src/tests/tests2/32_led.c:31:
In file included from /usr/include/stdlib.h:394:
In file included from /usr/include/x86_64-linux-gnu/sys/types.h:205:
/usr/include/x86_64-linux-gnu/sys/sysmacros.h:53: error: stray '\' in program

#   Failed test 'tcc test src/tests/tests2/32_led.c'
#   at t/30-tcc-test-suite.t line 79.
#          got: ''
#     expected: '     _   _       _       _
#   |  _|  _| |_| |_  |_    |
#   | |_   _|   |  _| |_|   |'
# Looks like you failed 1 test of 52.
t/30-tcc-test-suite.t .. 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/52 subtests