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[dsymutil] Print warning/error for unknown/missing arguments.

Description

[dsymutil] Print warning/error for unknown/missing arguments.

After changing dsymutil to use libOption, we lost error reporting for
missing required arguments (input files). Additionally, we stopped
complaining about unknown arguments. This patch fixes both and adds a
test.

Details

Committed
JDevlieghereOct 16 2019, 2:48 PM
Parents
rL375043: [AArch64] Fix offset calculation
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