Build: Update mcuboot tag to 1.7.0-rc1

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: I41b9a7e1984d49a724612c06a99b4d15f357eb18
diff --git a/config/config_default.cmake b/config/config_default.cmake
index 98abce9..14e4f75 100644
--- a/config/config_default.cmake
+++ b/config/config_default.cmake
@@ -133,7 +133,7 @@
 set(CMSIS_5_PATH                        "DOWNLOAD"  CACHE PATH      "Path to CMSIS_5 (or DOWNLOAD to fetch automatically")
 
 set(MCUBOOT_PATH                        "DOWNLOAD"  CACHE PATH      "Path to MCUboot (or DOWNLOAD to fetch automatically")
-set(MCUBOOT_VERSION                     "e8fe6cf"   CACHE STRING    "The version of MCUboot to use")
+set(MCUBOOT_VERSION                     "1.7.0-rc1" CACHE STRING    "The version of MCUboot to use")
 
 set(PSA_ARCH_TESTS_PATH                 "DOWNLOAD"  CACHE PATH      "Path to PSA arch tests (or DOWNLOAD to fetch automatically")
 set(PSA_ARCH_TESTS_VERSION              "master"    CACHE STRING    "The version of PSA arch tests to use")