configure: Also display the library dir in the summary
The summary now looks like:
Window Maker was configured as follows:
Installation path prefix : /usr/local
Installation path for binaries : /usr/local/bin
Installation path for libraries : /usr/lib64
Installation path for WPrefs.app : /usr/local
Supported graphic format libraries : XPM PNG JPEG TIFF builtin-PPM
Antialiased text support in WINGs : yes
Xinerama extension support : yes
XRandR extension support : yes
Translated message files to install : None
I want to see the library line in order to avoid forgetting that
I should put them in /usr/lib64 (and not in the defaul /usr/local/lib)