gcov: Support for the most streamlined profile of LLVM-embedded-toolchain-for-Arm

1. Excerpted from: https://github.com/ARM-software/LLVM-embedded-toolchain-for-Arm/blob/main/samples/src/cpp-baremetal-semihosting-prof/proflib.c
2. Since llvm profile supports more than just gcov, and some features have not yet been explored, two clang gcov implementations are supported after this patch
3. Using this lib only supports the gcov compilation options of "-fprofile-instr-generate -fcoverage-mapping"
4. This file is heavily dependent on the compiler clang version, and is currently aligned with ci, supporting 17.0.1 and below. 18 and above are not supported by this library due to different internal implementations of the compiler

Signed-off-by: wangmingrong1 <wangmingrong1@xiaomi.com>

libs/libbuiltin/Kconfig

@@ -29,11 +29,38 @@ config BUILTIN_TOOLCHAIN
 
 endchoice
 
+choice
+	prompt "Code coverage analysis support"
+	default COVERAGE_NONE
+	---help---
+		Select the code coverage analysis library
+
 config COVERAGE_COMPILER_RT
 	bool "Builtin libclang_rt.profile"
 	select LIB_BUILTIN
 	select LIB_COMPILER_RT
-	default n
+	---help---
+		Compile the LLVM Compiler-rt library into the OS.
+		Support adding native rich compilation options "-fprofile-xxx"
+
+config COVERAGE_MINI
+	bool "Builtin code coverage analysis mini library"
+	select LIB_BUILTIN
+	---help---
+		This is a mini version of the library, which is
+		used for code coverage analysis. If the toolchain
+		is clang, only support the compilation option
+		"-fprofile-instr-generate -fcoverage-mapping"
+
+config COVERAGE_TOOLCHAIN
+	bool "Link toolchain gcov library to the OS"
+	---help---
+		Link the toolchain coverage library to the OS.
+
+config COVERAGE_NONE
+	bool "Disable coverage function"
+
+endchoice
 
 choice
 	prompt "Builtin profile support"