grim/testing

Check pkg-config for ncurses before manually looking for it.
release-2.x.y
2021-06-07, Gary Kramlich
0fcf52e87380
Check pkg-config for ncurses before manually looking for it.

This patch originated from https://bugs.gentoo.org/461482 but is being applied
by Gary Kramlich

Testing Done:
Configured only, worked fine on debian unstable.

Reviewed at https://reviews.imfreedom.org/r/729/
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