Consistently indent continuation backslashes in macro definitions

...els/InterfaceCompositionModel/InterfaceCompositionModel.H

bin/tools/foamListSourceFiles

src/OpenFOAM/containers/Lists/PackedList/PackedList.C

src/OpenFOAM/db/IOstreams/token/token.H

src/OpenFOAM/db/error/StaticAssert.H

...unTimeSelection/construction/addToRunTimeSelectionTable.H

...db/runTimeSelection/construction/runTimeSelectionTables.H

...ction/globalFunctions/addToGlobalFunctionSelectionTable.H

...Selection/globalFunctions/globalFunctionSelectionTables.H

...ction/memberFunctions/addToMemberFunctionSelectionTable.H

...Selection/memberFunctions/memberFunctionSelectionTables.H

...MemberFunctions/addToStaticMemberFunctionSelectionTable.H

...aticMemberFunctions/staticMemberFunctionSelectionTables.H

src/OpenFOAM/db/typeInfo/className.H

src/OpenFOAM/db/typeInfo/typeInfo.H

...AM/dimensionedTypes/dimensionedScalar/dimensionedScalar.C

...enFOAM/dimensionedTypes/dimensionedType/dimensionedType.C

...enFOAM/dimensionedTypes/dimensionedType/dimensionedType.H

...lds/DimensionedFields/DimensionedField/DimensionedField.C

...sionedFields/DimensionedField/DimensionedFieldFunctions.C