RSE: Unittests: Update unity version to 2.6.1

The previously used Unity tag triggered a "missing-declarations" error
because the functions IsStringInBiggerString and
UnityStringArgumentMatches were used in only one source file but were
not declared as static. This issue has been resolved in the new
version.

Change-Id: I06e41ae0063eca8774e9e25be822c25c15129d9f
Signed-off-by: Gabor Toth <[email protected]>

Author: gabor-toth-arm

platform/ext/target/arm/rse/common/unittests/framework/unity/CMakeLists.txt

@@ -8,7 +8,7 @@
 set(FETCHCONTENT_QUIET FALSE)
 
 set(UNITY_PATH      "DOWNLOAD"  CACHE PATH      "Path to Unity (or DOWNLOAD to fetch automatically)")
-set(UNITY_TAG       "v2.6.0"   CACHE STRING     "Unity version to use")
+set(UNITY_TAG       "v2.6.1"   CACHE STRING     "Unity version to use")
 
 fetch_remote_library(
     LIB_NAME                    unity