xtools: support xtensa hal

Xtensa toolchain has a HAL library that needs to be compiled in similar
to how we do this with the Zephyr SDK.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

cmake/toolchain/xtools/target.cmake

@@ -17,3 +17,14 @@ set(SYSROOT_TARGET       ${CROSS_COMPILE_TARGET})
 
 set(CROSS_COMPILE ${TOOLCHAIN_HOME}/${CROSS_COMPILE_TARGET}/bin/${CROSS_COMPILE_TARGET}-)
 set(SYSROOT_DIR   ${TOOLCHAIN_HOME}/${SYSROOT_TARGET}/${SYSROOT_TARGET})
+
+if("${ARCH}" STREQUAL "xtensa")
+  set(SYSROOT_DIR ${TOOLCHAIN_HOME}/${SYSROOT_TARGET})
+  set(TOOLCHAIN_INCLUDES
+    ${SYSROOT_DIR}/include/arch/include
+    ${SYSROOT_DIR}/include
+    )
+
+  LIST(APPEND TOOLCHAIN_LIBS hal)
+  LIST(APPEND LIB_INCLUDE_DIR -L${SYSROOT_DIR}/lib)
+endif()