Preparing for v1.5.0-rc2

Signed-off-by: Fabio Utzig <utzig@apache.org>

README.md

@@ -6,7 +6,7 @@
 [coverity]: https://scan.coverity.com/projects/mcuboot
 [travis]: https://travis-ci.org/JuulLabs-OSS/mcuboot
 
-This is mcuboot version 1.5.0-rc1
+This is mcuboot version 1.5.0-rc2
 
 MCUboot is a secure bootloader for 32-bit MCUs. The goal of MCUboot is to
 define a common infrastructure for the bootloader, system flash layout on

repository.yml

@@ -27,7 +27,7 @@ repo.versions:
     "1.3.0": "v1.3.0"
     "1.3.1": "v1.3.1"
     "1.4.0": "v1.4.0"
-    "1.5.0": "v1.5.0-rc1"
+    "1.5.0": "v1.5.0-rc2"
 
     "0-dev": "0.0.0"        # master
     "0-latest": "1.3.1"     # latest stable release

scripts/imgtool/__init__.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-imgtool_version = "1.5.0rc1"
+imgtool_version = "1.5.0rc2"