Build: Update MCUboot version

Pick-up a version which contains all features
which were upstreamed from TF-M MCUboot fork.

Change-Id: Ic59069c8851cf003133124838365ae97abc389ba
Signed-off-by: Tamas Ban <tamas.ban@arm.com>
diff --git a/lib/ext/mcuboot/CMakeLists.txt b/lib/ext/mcuboot/CMakeLists.txt
index 4c817cd..822843f 100644
--- a/lib/ext/mcuboot/CMakeLists.txt
+++ b/lib/ext/mcuboot/CMakeLists.txt
@@ -17,10 +17,12 @@
     FetchContent_Declare(mcuboot
         GIT_REPOSITORY https://github.com/JuulLabs-OSS/mcuboot.git
         GIT_TAG ${MCUBOOT_VERSION}
-        GIT_SHALLOW TRUE
+        GIT_SHALLOW FALSE
         GIT_PROGRESS TRUE
         GIT_SUBMODULES ""
     )
+    # ToDo: set GIT_SHALLOW to 'TRUE' when MCUBOOT_VERSION will be set to a tag
+    # (instead of a commit hash) with the new release.
 
     FetchContent_GetProperties(mcuboot)
     if(NOT mcuboot_POPULATED)