Updates samples/localrc comment

The SWIFT_DATA_DIR default value stated in the last comment of
samples/localrc has been updated to match actual SWIFT_DATA_DIR
default value ($DEST/data/swift instead of $DEST/swift/data).

Addresses Bug: #1238665

Change-Id: I2510f72eb3eda467799202b356abb606930f4d94
Merge "Updates samples/localrc comment"