[libpng16] Imported from libpng-1.6.7beta02.tar
[libpng16] Bump version to 1.6.7beta03
[libpng16] Fix some typos in autogen.sh that don't affect its behavior
[libpng16] Added ARMv8 support (James Yu <james.yu at linaro.org>).  Added file

arm/filter_neon_intrinsics.c; enable with configuration flag
PNG_ARM_NEON_INTRINSICS.
[libpng16] Updated configure.ac to handle new on-intrinsics, etc., options.
[libpng16] Conditionally compile arm/filter_neon_intrinsics.c

if PNG_READ_SUPPORTED and PNG_ARM_NEON_OPT > 0
[libpng16] Work around problem with multiple-line "test" command missing

continuation backslashes
[libpng16] Update "last changed" dates in arm/filter_neon_intrinsics.c and

pngrtran.c