compile-fc-batt: allow possible third field in source lines Battery tables maintained in the fc-battery-conf repository will now have a third field added, defining thresholds for the battery bars icon, and there will be a new utility to compile them into the new /etc/batterytab2 file read by the FC Tourmaline version of our FCHG driver. For backward compatibility with the original Magnetite version of FCHG, compile-fc-batt remains the tool for compiling the original /etc/batterytab file format, and it needs to ignore the newly added third field in battery table sources.

s,^CC=.*$,CC=	/opt/arm-2012.03/bin/arm-none-linux-gnueabi-gcc,
s,^CFLAGS=.*$,CFLAGS=	-O2 -march=armv4t -mtune=arm920t -DGTA0x_AP_BUILD,
s,^PROGS=.*$,PROGS=	fc-iram fc-loadtool fc-xram,
s,^EXTRA_OBJ=.*$,EXTRA_OBJ=	compaldummy.o gtapower.o,