powerpc/ci: Enable -Werror for clang builds #887

Annotations

10 errors and 6 warnings

alsa/asoundlib.h: No such file or directory

cap-ng.h: No such file or directory

ld returned 1 exit status

sys/capability.h: No such file or directory

ld returned 1 exit status

popt.h: No such file or directory

'str_vsyscall_2' defined but not used [-Wunused-const-variable=]

'str_vsyscall_1' defined but not used [-Wunused-const-variable=]

'str_vsyscall_0' defined but not used [-Wunused-const-variable=]

'str_vsyscall' defined but not used [-Wunused-variable]

format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type '__u64' {aka 'long unsigned int'} [-Wformat=]

jobserver unavailable: using -j1. Add '+' to parent make rule.