Patch to add dependency between client executes and static libraries

Hi, all

The attached patch trying to add dependency between client executes
and static libraries.

As described in message: https://www.postgresql.org/message-id/flat/CAFmBtr1GDF%2BCpw%2B7SZF8jWGeazOd%3D%3DivRAg3rWhLaRXYCv83Vg%40mail.gmail.com#CAFmBtr1GDF+Cpw+7SZF8jWGeazOd==ivRAg3rWhLaRXYCv83Vg@mail.gmail.com

I add a STLIBS variable in Makefiles as normal prerequisite.
Then, for example, if you update something in psqlscan.l, then make will
rebuild psql automatically.

Since I don't know if the lak of dependency is problem or not,
this patch maybe useless.

Thanks,


--
GaoZengqi
pgf00a@gmail.com
zengqigao@gmail.com