Add QtQuick1 plugin's major version to target path

This ensures that the plugin is only loaded when "import QtQuick 1.0"
(or 1.x, rather) is used, and not when "import QtQuick 2.0" (or a
later version) is used.

Change-Id: I3f7621f316449071d7a891c72840ab1d2fd6b962
Reviewed-by: Aaron Kennedy <aaron.kennedy@nokia.com>

src/imports/qtquick1/qtquick1.pro

@@ -1,5 +1,5 @@
 TARGET  = qtquick1plugin
-TARGETPATH = QtQuick
+TARGETPATH = QtQuick.1
 include(../qimportbase.pri)
 
 SOURCES += \