[Freewx-maint] Bug#749292: wxwidgets3.0: wx-config --libs std now includes webview library

[Olly Betts]

Source: wxwidgets3.0
Version: 3.0.0-3
Severity: serious
Justification: Renders package unsuitable for release in maintainer's opinion

The change to enable building the webview library (#738849) will cause
many packages which BD on libwxgtk3.0-dev to FTBFS.  

The issues regarding this are already being discussed in #738849, but we
don't want this migrating to testing, so opening this bug to prevent
that from happening.

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.13-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash