test/codegen: fix ARM32 RotateLeft32 test
test/codegen: fix ARM32 RotateLeft32 test

The syntax of a shifted operation does not have a "$" sign for
the shift amount. Remove it.

Change-Id: I50782fe942b640076f48c2fafea4d3175be8ff99
Reviewed-on: https://go-review.googlesource.com/c/go/+/192100
Run-TryBot: Cherry Zhang <d62e63aa42ce272d7b6a5055d97e942b33a34679@google.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

akutz/go,nawawi/go,golang/go,golang/go,akutz/go,akutz/go,CAFxX/go,nawawi/go,nawawi/go,akutz/go,nawawi/go,cloudflare/go,akutz/go,golang/go,akutz/go,cloudflare/go,golang/go,golang/go,CAFxX/go,cloudflare/go,cloudflare/go,nawawi/go,nawawi/go,CAFxX/go,golang/go,cloudflare/go,CAFxX/go,nawawi/go,golang/go,CAFxX/go,CAFxX/go,cloudflare/go,akutz/go,golang/go,akutz/go,cloudflare/go,cloudflare/go,CAFxX/go,CAFxX/go,nawawi/go