mroonga fails embedded tests in 10.1

mroonga crashes in embedded tests in 10.1.

this looks like a linking problem. the crash happens immediately in mrn_init() on

mrn_hton_ptr = hton;

In -DCMAKE_BUILD_TYPE=Debug this is compiled to

	movq	mrn_hton_ptr@GOTPCREL(%rip), %rax

	movq	-32(%rbp), %rdx

	movq	%rdx, (%rax)

And in gdb I see that %rax is 0 in the last line. Other plugins (for example, qc_info plugin) succeed, while having very similar code. I'd guess the issue has something to do with compilation or linking options that mroonga uses.

As a temporary workaround I have made mroonga tests not to run by default in embedded test runs.