tests/subsys/fs/fat_fs_api assertion fail on arduino101

[yerabolu]

Commit ID :
0d0b221
Console output

E#1      @srrsotc04/QA-a101-00  console output: ***** delaying boot 1000ms (per build configuration) *****
E#1      @srrsotc04/QA-a101-00  console output: ***** Booting Zephyr OS 1.13.0-rc1 (delayed boot 1000ms) *****
E#1      @srrsotc04/QA-a101-00  console output: Running test suite fat_fs_basic_test
E#1      @srrsotc04/QA-a101-00  console output: ===================================================================
E#1      @srrsotc04/QA-a101-00  console output: starting test - test_fat_mount
E#1      @srrsotc04/QA-a101-00  console output: ASSERTION FAIL [(res == FR_OK)] @ /home/jenkins/workspace/zephyr-master-tcf-v0.11-branch/LABEL/verify/SHARD/2-3/ZEPHYR_GCC_VARIANT/zephyr/zephyr.git/subsys/fs/fat_fs.c:333:
E#1      @srrsotc04/QA-a101-00  console output: 	FS init failed (-19)

system seems to have crashed after the assertion failure as no further output is reported.

[nashif]

duplicate #8506