pidgin: Use python3
pidgin: Use python3

Fixes python-sipe build failures e.g.
../../../pidgin-sipe-1.25.0/src/purple/purple-dbus.h:33:10: fatal error: dbus-server.h: No such file or directory
| #include "dbus-server.h"
|          ^~~~~~~~~~~~~~~

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

victronenergy/meta-openembedded,lgirdk/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,moto-timo/meta-openembedded,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,lgirdk/meta-openembedded,VCTLabs/meta-openembedded,moto-timo/meta-openembedded,victronenergy/meta-openembedded,schnitzeltony/meta-openembedded,rehsack/meta-openembedded,victronenergy/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,moto-timo/meta-openembedded,rehsack/meta-openembedded,openembedded/meta-openembedded,schnitzeltony/meta-openembedded,victronenergy/meta-openembedded,rehsack/meta-openembedded,moto-timo/meta-openembedded,schnitzeltony/meta-openembedded,openembedded/meta-openembedded,lgirdk/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,lgirdk/meta-openembedded,lgirdk/meta-openembedded,lgirdk/meta-openembedded,schnitzeltony/meta-openembedded,openembedded/meta-openembedded,victronenergy/meta-openembedded,schnitzeltony/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,moto-timo/meta-openembedded,victronenergy/meta-openembedded,rehsack/meta-openembedded,victronenergy/meta-openembedded,lgirdk/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,schnitzeltony/meta-openembedded,rehsack/meta-openembedded,rehsack/meta-openembedded