Bugzilla Bug 213055

Attempting to emerge with the doc useflag results in an error due to an
unspecified dependency on unzip. The problem appears to be in newer unstable
ebuilds as well.

Reproducible: Always

Steps to Reproduce:
1. On a system without unzip run USE="doc" emerge =dev-db/sqlite-3.5.3


Actual Results:  
 *
 * ERROR: dev-db/sqlite-3.5.3 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_unpack
 *             environment, line 3040:  Called unpack 'src_unpack' 'src_unpack'
 *               ebuild.sh, line  344:  Called die
 * The specific snippet of code:
 *                              unzip -qo "${srcdir}${x}" || die "$myfail"
 *  The die message:
 *   failure unpacking sqlite_docs_3_5_3.zip
 *
 * If you need support, post the topmost build error, and the call stack if
relevant.
 * A complete build log is located at
'/var/tmp/portage/dev-db/sqlite-3.5.3/temp/build.log'.
 * The ebuild environment file is located at
'/var/tmp/portage/dev-db/sqlite-3.5.3/temp/environment'.
 *

Fixed.