bug#10997: pkglibexecdir is unconditionally created when make install

[Daiki Ueno]

I got a bug report for my package, which conditionally installs some
scripts into pkglibexecdir like this:

if ENABLE_FOO
pkglibexec_SCRIPTS = bar
endif

where pkglibexec* is not referred outside of if...endif.  When "make
install", automake creates pkglibexecdir even when ENABLE_FOO is false.

I'm attaching a prove which demonstrates the behavior.

instdir-cond.test
Description: Binary data

Regards,
-- 
Daiki Ueno