Version updates for 1.7.2-rc2

Update version indicators for 1.7.2-rc2 release.

Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/README.md b/README.md
index c2be930..d1b45da 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@
 [travis]: https://travis-ci.org/mcu-tools/mcuboot
 [license]: https://github.com/mcu-tools/mcuboot/blob/master/LICENSE
 
-This is mcuboot version 1.7.2-rc1
+This is mcuboot version 1.7.2-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
diff --git a/docs/release-notes.md b/docs/release-notes.md
index 58d77a2..e2ede02 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -3,7 +3,7 @@
 - Table of Contents
 {:toc}
 
-## Version 1.7.2-rc1
+## Version 1.7.2-rc2
 
 The 1.7.2-rc1 release of MCUboot is a minor patch release.  It makes a few
 changes to the CI build process, and changes the exporting of the
diff --git a/repository.yml b/repository.yml
index f751aaa..806fcb9 100644
--- a/repository.yml
+++ b/repository.yml
@@ -32,7 +32,7 @@
     "1.6.0": "v1.6.0"
     "1.7.0": "v1.7.0"
     "1.7.1": "v1.7.1"
-    "1.7.2": "v1.7.2-rc1"
+    "1.7.2": "v1.7.2-rc2"
 
     "0-dev": "0.0.0"        # master
     "0-latest": "1.7.1"     # latest stable release
diff --git a/scripts/imgtool/__init__.py b/scripts/imgtool/__init__.py
index a15e783..edc62b3 100644
--- a/scripts/imgtool/__init__.py
+++ b/scripts/imgtool/__init__.py
@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-imgtool_version = "1.7.2rc1"
+imgtool_version = "1.7.2rc2"