error: uv_wrap.h: No such file or directory on unit:gcc:tarball CI job

unit:gcc:tarball CI job fail with:

tcp_test.c:37:10: fatal error: uv_wrap.h: No such file or directory
 #include "uv_wrap.h"
          ^~~~~~~~~~~
...
udp_test.c:37:10: fatal error: uv_wrap.h: No such file or directory
 #include "uv_wrap.h"
          ^~~~~~~~~~~

I think uv_wrap.h is missing in libisctest_la_SOURCES and therefore make dist of tarball-create CI job does not include it.