build: fix up style issues in configure script
build: fix up style issues in configure script

* Use single quotes consistently.
* Remove a few stray semicolons.
* Fix up some overly long lines.
* Line up a few expressions.

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