package/ccache: bump to version 3.3.3

Note, that version 3.3.3 of ccache fixes a bug [1] where the Linux
kernel image is the same even after changing the source code and
rebuilding it.

[1] https://github.com/ccache/ccache/issues/136



Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>