igvmbuilder: fix incorrect CPUID table construction #416
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The IGVM file specifies the set of CPUID leaves that are expected to be provided when the IGVM file is loaded. The builder was erroneously specifying leaf EAX=1 with subleaf ECX=1, which is not architecturally defined. This caused the subsequent CPUID lookup to fail when the SVSM would execute its CPUID lookup code.