Use pkgfile to resolve library dependencies

[nponeccop]

cblrepo pkgbuild puts dependencies it detects as is, which is wrong. There is pkgfile tool that finds which package if any provides a given file.

Calls of pkgfile /usr/lib/lib$1.so will avoid many .pkbuild patches in habs:

• GLURaw
• OpenGLRaw
• Unixutils
• X11 (3 of 4)
• digest
• persistent-sqlite
• ...

[magthe]

For extra-libraries the processing would probably have to go

<extra-lib> -> call pkgfile lib<extra-lib>.so -> parsing of output

Things to consider

• On 64-bit machines many libraries are provided by two packages, no package should depend on anything from multilib (I think).
• packages in base and base-devel should not be included in the dependencies.