Update bcm2835 library to 1.32

Please update the bcm2835 library to 1.32 as there is support for Raspberry Pi v.1 models.
I can compile for v.1 like this: "make CCFLAGS=-DI2C_V1".
Witout this the pifweb.py example (and I2C in general) does not work on the Pi v.1.