CMake: Refactor target MCU_STM32F103xE library name

Author: harrisonmutai-arm

targets/TARGET_STM/TARGET_STM32F1/TARGET_STM32F103xE/CMakeLists.txt

@@ -9,19 +9,19 @@ elseif(${MBED_TOOLCHAIN} STREQUAL "ARM")
     set(LINKER_FILE TOOLCHAIN_ARM/stm32f103xe.sct)
 endif()
 
-add_library(STM32F103xE INTERFACE)
+add_library(mbed-stm32f103xe INTERFACE)
 
-target_sources(STM32F103xE
+target_sources(mbed-stm32f103xe
     INTERFACE
         system_clock.c
         ${STARTUP_FILE}
 )
 
-target_include_directories(STM32F103xE
+target_include_directories(mbed-stm32f103xe
     INTERFACE
         .
 )
 
-mbed_set_linker_script(STM32F103xE ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
+mbed_set_linker_script(mbed-stm32f103xe  ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_FILE})
 
-target_link_libraries(STM32F103xE INTERFACE STM32F1)
+target_link_libraries(mbed-stm32f103xe INTERFACE mbed-stm32f1)