StandaloneMmPkg: Initialize 'WillReturn' variable #3

Job	Run time
Analyze (ArmPkg, IA32,X64)	5m 8s
Analyze (CryptoPkg, IA32)	18m 20s
Analyze (CryptoPkg, X64)	22m 0s
Analyze (DynamicTablesPkg, IA32,X64)	13m 6s
Analyze (FatPkg, IA32,X64)	9m 37s
Analyze (FmpDevicePkg, IA32,X64)	9m 26s
Analyze (IntelFsp2Pkg, IA32,X64)	10m 22s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	10m 20s
Analyze (MdeModulePkg, IA32)	16m 38s
Analyze (MdeModulePkg, X64)	15m 49s
Analyze (MdePkg, IA32,X64)	10m 29s
Analyze (PcAtChipsetPkg, IA32,X64)	13m 41s
Analyze (PrmPkg, IA32,X64)	8m 31s
Analyze (SecurityPkg, IA32,X64)	12m 31s
Analyze (ShellPkg, IA32,X64)	14m 33s
Analyze (SourceLevelDebugPkg, IA32,X64)	13m 8s
Analyze (StandaloneMmPkg, IA32,X64)	14m 32s
Analyze (UefiCpuPkg, IA32,X64)	20m 8s
Analyze (UnitTestFrameworkPkg, IA32,X64)	9m 46s
	4h 8m 5s

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