…tes and fixes:

- flash-journal basicAPI fix for ARM toolchain
- Updated storage-abstraction with version 0.4.7
  (commit c7c4a8c52298bbc006a6f53a059fb2599cad73cc).
- https://github.com/ARMmbed/storage-volume-manager at version v0.2.10.
- https://github.com/ARMmbed/mtd-k64f v0.4.2 version of flash.c (imported as storage_driver.c).
- update to CFSTORE to use the storage-volume-manager API to initialize volume manager and
  add a volume for CFSTORE to use.
- https://github.com/ARMmbed/flash-journal at version v0.5.3
  (commit 4c58165e2fa02c6ed2b9d166a9c96967e81f458f) including readFrom() support.
- Taking flash-journal-strategy-sequential v0.6.7 strategy.c
  (commit b11a718761aa9f33679956968a21aaef9179bde1).
- GCC_ARM, ARM and IAR compiler warning fixes for new versions of flash-journal code.
- Fix storage-volume-manager test cases for concurrent access from 2 volumes to use
  addresses within the 512-1024kB address range, which is within the cfstore added volume.
- Fix cfstore/storage-volume-manager IAR warnings when building with verbose flag.

…ot supported in mbed sdk builds