Enable the "#include <QAudio>" camel-case header (regression)
Enable the "#include <QAudio>" camel-case header (regression)

The header was available in Qt 4, but somehow went missing.

Change-Id: I5e54921afd6e196d67db797331a0b0093f41ce34
Reviewed-by: Lars Knoll <a812617a4072dcbeb80684eca0f369f0083af109@digia.com>
Reviewed-by: Stephen Kelly <b039a7232b458ac8785f8e91519ad165c3ac28cd@kdab.com>

nezticle/qtmultimedia,jfaust/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,jfaust/qtmultimedia,webOS-ports/qtmultimedia,mer-qt/qtmultimedia,nezticle/qtmultimedia,sergiusens/qtmultimedia,mer-qt/qtmultimedia,sergiusens/qtmultimedia,sergiusens/qtmultimedia,nezticle/qtmultimedia,nezticle/qtmultimedia,jfaust/qtmultimedia,sergiusens/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,webOS-ports/qtmultimedia,nezticle/qtmultimedia,sergiusens/qtmultimedia,jfaust/qtmultimedia,mer-qt/qtmultimedia