package: remove superfluous character.
modules: updated FindCorrade.cmake from Corrade repository.
Install and find debug libraries with "-d" suffix.

Makes it possible to have both debug and release libraries installed. If
both libraries are present when finding the package, proper version is
used based on what configuration is used in depending project.
package: updated FindCorrade.cmake from Corrade repository.
Install also debug plugins to different location.

Following changes done in Corrade.
package: build both debug and release libs in PKGBUILD-release.