Fixed BUILD_RUBY.
Revert "Set x bit on mkcallback.rb."

This reverts commit a1d313345be6dab71b3a071e78c6ba320f5a2978.
Revert "Set x bit on mkcall and mkcbtable."

This reverts commit 2f4ed719b19289a10c65276980f33097580b010e.
Bumped version to 1.0.3.