Fixed CeTest remotelib build for WinCE 5.

Fixed CeTest remotelib build for WinCE 5.

WinCE 5 does not have PPN_POWERBUTTONPRESSED but PPN_SUSPENDKEYPRESSED.
Newer WinCE version have both, but PPN_POWERBUTTONPRESSED is defined
to same as PPN_SUSPENKEYPRESSED, that's why it is safe to use
PPN_SUSPENKEYPRESSED in all WinCE versions.

Change-Id: Ida0604f86330c3e833a1ad41a88db55aa6a625fa
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
(cherry picked from commit 15f84271e8eb47a035ad572fb3db81171f354839)
Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com>