AtomicStorageOps is missing dependency on AtomicStorage

[bashbaug]

According to the SPV_KHR_shader_atomic_counter_ops extension, AtomicStorageOps should depend on / implicitly declare AtomicStorage, but this dependency isn't described in the grammar file:

SPIRV-Headers/include/spirv/unified1/spirv.core.grammar.json

Lines 15712 to 15717 in 2b2e05e

	{
	"enumerant" : "AtomicStorageOps",
	"value" : 4445,
	"extensions" : [ "SPV_KHR_shader_atomic_counter_ops" ],
	"version" : "None"
	},

Since the extension spec refers to the dependency in several places, I think the grammar file should be updated and not the extension text, but either could be modified to fix the inconsistency.