message: Fix a bug related to build TF Lite on RPI Zero.
  Why:
  * Enable to build TF Lite on RPI Zero.
  This change addresses the need by:
  * Changing compiler from arm-linux-gnueabi- to arm-linux-gnueabihf-.
diff: @@ -32,7 +32,7 @@ ifeq ($(TARGET),rpi)
  # TODO(petewarden) In the future, we'll want to use OpenBLAS as a faster
  # alternative to Eigen on non-NEON ARM hardware like armv6.
  ifeq ($(TARGET_ARCH), armv6)
  - TARGET_TOOLCHAIN_PREFIX := arm-linux-gnueabi-
  + TARGET_TOOLCHAIN_PREFIX := arm-linux-gnueabihf-
  CXXFLAGS += \
  -march=armv6 \
  -mfpu=vfp \
  