manifes: update mcuboot

Synchronized up to:
https://github.com/JuulLabs-OSS/mcuboot/commit/ce11597

- corrected bugfix JuulLabs-OSS#830 of upgrade issue in swap-move
- changed default for CONFIG_MCUBOOT_CLEANUP_ARM_CODE to n,
- added MPU register clean-up to this option
- bootutil: ecdsa: Fixed CC310 for nRF devices
- zephyr: made flash_area_erased_val() weak
- serial recovery: allow unaligned last image data chunk

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
diff --git a/west.yml b/west.yml
index 31ed25c..079f9c6 100644
--- a/west.yml
+++ b/west.yml
@@ -93,7 +93,7 @@
       revision: aef137b1af8aa7a0f43345c82459254b8832262e
       path: modules/crypto/mbedtls
     - name: mcuboot
-      revision: e64c5f00d67cf858d1fdead7135f5d61de2a4c68
+      revision: c71d2186077f9fd5f6d1aa53ee3f09dc41ce78f6
       path: bootloader/mcuboot
     - name: mcumgr
       revision: 5051f9d900bbb194a23d4ce80f3c6dc6d6780cc2