8261659: JDK-8261027 causes a Tier1 validate-source failure

Reviewed-by: iignatyev, bpb

Author: Daniel D. Daugherty

src/hotspot/os_cpu/linux_aarch64/atomic_linux_aarch64.S

@@ -1,20 +1,20 @@
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-
+//
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+//
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-
+//
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