Explicitly set LD_LIBRARY_PATH for GCC 5 toolchain test in travis-ci
Explicitly set LD_LIBRARY_PATH for GCC 5 toolchain test in travis-ci

The change is caused by use of arm-none-eabi-gcc-ar (required for LTO)
instead of arm-none-eabi-ar.
DISTORTEC/distortos,jasmin-j/distortos,jasmin-j/distortos,CezaryGapinski/distortos,DISTORTEC/distortos,CezaryGapinski/distortos,jasmin-j/distortos,DISTORTEC/distortos,CezaryGapinski/distortos,jasmin-j/distortos,CezaryGapinski/distortos,CezaryGapinski/distortos,DISTORTEC/distortos,jasmin-j/distortos