Remove Mbed Crypto source files before importing

[dgreen-arm]

Description

Currently the Mbed Crypto importer doesn't handle file deletions properly when importing. This PR fixes the importer to remove the old src folder first before importing.

Pull request type

[x] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

Reviewers

Release Notes

[Patater]

LGTM

[0xc0170]

CI started

[mbed-ci]

Test run: FAILED

Summary: 1 of 4 test jobs failed
Build number : 1
Build artifacts

Failed test jobs:

• jenkins-ci/mbed-os-ci_build-ARM

[Patater]

Compile [ 98.2%]: i2c_api.c
Compile [ 98.3%]: port_api.c
Compile [ 98.4%]: analogin_api.c
Compile [ 98.6%]: flash_api.c
Compile [ 98.7%]: fsl_common.c
Compile [ 98.8%]: spi_api.c
Compile [ 98.9%]: rtx_thread.c
Compile [ 99.0%]: gpio_irq_api.c
Compile [ 99.2%]: rtc_api.c
Compile [ 99.3%]: sleep.c
Compile [ 99.4%]: fsl_uart.c
Compile [ 99.5%]: lp_ticker.c
Compile [ 99.6%]: fsl_i2c.c
Compile [ 99.8%]: analogout_api.c
Compile [ 99.9%]: fsl_dspi.c
Compile [100.0%]: USBPhy_Kinetis.cpp
Traceback (most recent call last):
  File "/builds/ws/mbed-os-ci_build-ARM@2/mbed-os/tools/test.py", line 300, in main
    resource_filter=resource_filter)
  File "/builds/ws/mbed-os-ci_build-ARM@2/mbed-os/tools/test_api.py", line 2196, in build_tests
    raise ToolException("Compile did not finish in 10 minutes")
ToolException: Compile did not finish in 10 minutes
[ERROR] Compile did not finish in 10 minutes
[mbed] ERROR: "/builds/ws/mbed-os-ci_build-ARM@2/pyenv/bin/python" returned error.
       Code: -11
       Path: "/builds/ws/mbed-os-ci_build-ARM@2/mbed-os"
       Command: "/builds/ws/mbed-os-ci_build-ARM@2/pyenv/bin/python -u /builds/ws/mbed-os-ci_build-ARM@2/mbed-os/tools/test.py -D MBED_HEAP_STATS_ENABLED=1 -D MBED_STACK_STATS_ENABLED=1 -D MBED_TRAP_ERRORS_ENABLED=1 -D MBED_ALL_STATS_ENABLED -D SKIP_TIME_DRIFT_TESTS=1 -D MBED_TEST_MODE -t ARM -m K22F --source . --build ./BUILD/tests/K22F/ARM --test-spec ./BUILD/tests/K22F/ARM/test_spec.json --build-data BUILD/tests/build_data.json --greentea"
       Tip: You could retry the last command with "-v" flag for verbose output
---
[mbed] Working path "/builds/ws/mbed-os-ci_build-ARM@2/mbed-os" (program)

[0xc0170]

Ci restarted, internal fault

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 2
Build artifacts