Log Message:
libgtop: disable use of gtk-doc

Only three png files are not installed any longer, so this
does not really seem to make the package worse, and it fixes
the build problem with gtk-doc-1.26, which removed gtkdoc-mktmpl.

Explicitly add bash to tools, it's the CONFIG_SHELL but was pulled in
indirectly.

Bump PKGREVISION.