MLECO-2671: Bumping up Armclang min version.

Issues identified with Armclang 6.15; bumping up the minimum
version required to Armclang 6.16.

Change-Id: I33ec21f04e0c954919cacaf6f3c4d99ef8f517cc
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>
diff --git a/scripts/cmake/toolchains/bare-metal-armclang.cmake b/scripts/cmake/toolchains/bare-metal-armclang.cmake
index 2ac2ac4..4852db1 100644
--- a/scripts/cmake/toolchains/bare-metal-armclang.cmake
+++ b/scripts/cmake/toolchains/bare-metal-armclang.cmake
@@ -25,7 +25,7 @@
 set(CMAKE_CROSSCOMPILING            true)
 set(CMAKE_SYSTEM_NAME               Generic)
 
-set(MIN_ARM_CLANG_VERSION           6.15)
+set(MIN_ARM_CLANG_VERSION           6.16)
 
 # Skip compiler test execution
 set(CMAKE_C_COMPILER_WORKS          1)
@@ -133,6 +133,6 @@
 # Function to assert the compiler version
 function(enforce_compiler_version)
     if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MIN_ARM_CLANG_VERSION})
-        message( FATAL_ERROR "Arm compiler version must be ${MIN_ARM_CLANG_VERSION} or greater to support ${CMAKE_SYSTEM_PROCESSOR} architecture." )
+        message( FATAL_ERROR "Arm compiler version must be ${MIN_ARM_CLANG_VERSION} or greater." )
     endif()
 endfunction()