Cross Reference: /external/libcxx/test/std/utilities/ratio/ratio.arithmetic

`Name`	`Date`	`Size`
Up to higher level directory
`ratio_add.fail.cpp`	22-Oct-2020	`538`
`ratio_add.pass.cpp`	22-Oct-2020	`2.1K`
`ratio_divide.fail.cpp`	22-Oct-2020	`544`
`ratio_divide.pass.cpp`	22-Oct-2020	`1.7K`
`ratio_multiply.fail.cpp`	22-Oct-2020	`548`
`ratio_multiply.pass.cpp`	22-Oct-2020	`1.7K`
`ratio_subtract.fail.cpp`	22-Oct-2020	`549`
`ratio_subtract.pass.cpp`	22-Oct-2020	`2.2K`