MLECO-3186: Each use case should same namespace convention as KWS and ASR

Certain UCs required additional work due to case context variables which also
became part of a namespace in generated files.
Solution was to declare these extra variables as part of the UC namespace in the respective model.hpp files.
Additional changes to standardise use of namespaces may be required - proposing new task.

Minor typo and rewording of customizing.md in relevant sections included.

Signed-off-by: Liam Barry <liam.barry@arm.com>
Change-Id: Ie78f82a30be252cb841136ea5115f21fc8d762cb
diff --git a/source/hal/source/platform/mps3/CMakeLists.txt b/source/hal/source/platform/mps3/CMakeLists.txt
index 46da2fa..332837c 100644
--- a/source/hal/source/platform/mps3/CMakeLists.txt
+++ b/source/hal/source/platform/mps3/CMakeLists.txt
@@ -25,7 +25,7 @@
     DESCRIPTION     "Platform drivers library for MPS3 FPGA/FVP targets"
     LANGUAGES       C CXX ASM)
 
-# 1. We should be cross-compiling (MPS3 taregt only runs Cortex-M targets)
+# 1. We should be cross-compiling (MPS3 target only runs Cortex-M targets)
 if (NOT ${CMAKE_CROSSCOMPILING})
     message(FATAL_ERROR "No ${PLATFORM_DRIVERS_TARGET} support for this target.")
 endif()