build: remove --shared-cares configure switch
build: remove --shared-cares configure switch

c-ares is a) bundled with libuv now, and b) contains out-of-tree patches. It no
longer makes sense to link against a shared library.

Fixes #2117.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node