fix: 编译参数少了pthread

bsp/linux/xmake.lua

@@ -18,7 +18,7 @@ set_languages("c11", "cxx11")
 
 add_defines("__LUATOS__", "__XMAKE_BUILD__")
 add_cflags("-ffunction-sections","-fdata-sections", "-Wl,--gc-sections","-D_POSIX_C_SOURCE=199309L")
-add_ldflags("-ffunction-sections","-fdata-sections", "-Wl,--gc-sections", "-lreadline","-lm")
+add_ldflags("-ffunction-sections","-fdata-sections", "-Wl,--gc-sections", "-lreadline","-lm","-pthread")
 
 add_requires("libsdl")
 add_packages("libsdl")