Removed warnings about format strings when running littlefs tests
Removed warnings about format strings when running littlefs tests

The difference gcc targets differ with format strings in some odd
(but not against the rules) ways. Most notable, the uint32_t in
i386/x86_64 gcc uses %d, whereas on cortex-m gcc uses %ld.

This makes dealing with warnings on code that goes between the two
rather annoying.

mbedmicro/mbed,ryankurte/mbed-os,mazimkhan/mbed-os,CalSol/mbed,ryankurte/mbed-os,c1728p9/mbed-os,ryankurte/mbed-os,mbedmicro/mbed,Archcady/mbed-os,ryankurte/mbed-os,kjbracey-arm/mbed,Archcady/mbed-os,betzw/mbed-os,ryankurte/mbed-os,betzw/mbed-os,karsev/mbed-os,karsev/mbed-os,karsev/mbed-os,mazimkhan/mbed-os,CalSol/mbed,betzw/mbed-os,CalSol/mbed,c1728p9/mbed-os,kjbracey-arm/mbed,mazimkhan/mbed-os,CalSol/mbed,andcor02/mbed-os,c1728p9/mbed-os,Archcady/mbed-os,Archcady/mbed-os,andcor02/mbed-os,karsev/mbed-os,betzw/mbed-os,andcor02/mbed-os,ryankurte/mbed-os,andcor02/mbed-os,karsev/mbed-os,Archcady/mbed-os,andcor02/mbed-os,betzw/mbed-os,mbedmicro/mbed,kjbracey-arm/mbed,c1728p9/mbed-os,CalSol/mbed,CalSol/mbed,c1728p9/mbed-os,c1728p9/mbed-os,mazimkhan/mbed-os,mazimkhan/mbed-os,kjbracey-arm/mbed,Archcady/mbed-os,mazimkhan/mbed-os,betzw/mbed-os,karsev/mbed-os,mbedmicro/mbed,andcor02/mbed-os,mbedmicro/mbed