qemu-ga: add missing libpcre to MSI build

qemu-ga: add missing libpcre to MSI build

glib depends on libpcre which was not shipped with the MSI, thus
starting of the qemu-ga.exe failed with the respective error message.

Tell WIXL to ship this library with the MSI to avoid this problem.

Signed-off-by: Thomas Lamprecht <[email protected]>
CC: Stefan Weil <[email protected]>
CC: Michael Roth <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]>
Signed-off-by: Michael Roth <[email protected]>