update arm_pack_manager index

[bentcooke]

Description

Update the arm pack index files to include new target mcus from the arm packs.

The new pack index was generated with the following command:
$ mbed export --update-packs -i uvision5 -m K64F

Pull request type

[ ] Fix
[x] Refactor
[ ] New target
[ ] Feature
[ ] Breaking change

[cmonr]

Sometimes, git diffs are gonna derp.

LGTM.

[cmonr]

/morph build

[mbed-ci]

Build : SUCCESS

Build number : 2392
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/7266/

Triggering tests

/morph test
/morph uvisor-test
/morph export-build
/morph mbed2-build

[mbed-ci]

Exporter Build : SUCCESS

Build number : 2028
Build artifacts/logs : http://mbed-os.s3-website-eu-west-1.amazonaws.com/?prefix=builds/exporter/7266/

[mbed-ci]

Test : SUCCESS

Build number : 2179
Test logs :http://mbed-os-logs.s3-website-us-west-1.amazonaws.com/?prefix=logs/7266/2179

[jeromecoutant]

@theotherjimmy
Is this PR related to the work you have started with arm packs ? #5968

[theotherjimmy]

@jeromecoutant No. That PR will be named something like update arm-pack-manager to cmsis-pack-manager.