Expand QT_TR_NOOP("str") to "str", not ("str").

Expand QT_TR_NOOP("str") to "str", not ("str").

This enables us to write code like :
    QStringLiteral(QT_TR_NOOP("Press"))
or just:
    QT_UNICODE_LITERAL(QT_TR_NOOP("Press"))

It also makes it consistent with the QT_TRANSLATE_NOOP3,
QT_TRANSLATE_NOOP3_UTF8 and QT_TRID_NOOP macros, as they don't surround
the string literals with parenthesis.

Change-Id: I67c30bcd88609f897bd22afb44266affa4dcfc8f
Reviewed-by: Jan-Arve Sæther <jan-arve.saether@nokia.com>