Dropping newlines in the test macros used in test-asm-validator.
This will make the tests number from 1, rather than 39,
making them easier to read.

LOG=N
BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-asm-validator
R=aseemgarg@chromium.org

Review URL: https://codereview.chromium.org/1812383002

Cr-Commit-Position: refs/heads/master@{#34907}