php: cleanup patches

Convert patches from pure configure ones to *.m4/configure.in cleanness.
This allows us to AUTORECONF (well, not quite, but close).
Even though upstream will probably not accept them it's the right way.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>