gcutil to 1.8.3

Closes #21784.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
rock: fix SHA1

The rock maintainers (guilty..) released a late fix to the 0.9.6 release, and the SHA1 hash has changed. Without this fix, rock fails to install.

Closes #21785.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
grads: style nit
libraw: style nit