Improve the arch judgement for mips
Reference:
|| defined(_mips) \
|| defined(__mips__)
# define TB_ARCH_MIPS
+# if defined(_MIPSEB)
+# if (_MIPS_SIM==_ABIO32)
# define TB_ARCH_STRING "mips"
+# elif (_MIPS_SIM==_ABIN32)
+# define TB_ARCH_STRING "mipsin32"
+# elif (_MIPS_SIM==_ABI64)
+# define TB_ARCH_STRING "mips64"
+# endif
+# elif defined(_MIPSEL)
+# if (_MIPS_SIM==_ABIO32)
+# define TB_ARCH_STRING "mipsel"
+# elif (_MIPS_SIM==_ABIN32)
+# define TB_ARCH_STRING "mipsin32el"
+# elif (_MIPS_SIM==_ABI64)
+# define TB_ARCH_STRING "mips64el"
+# endif
+# endif
#elif defined(TB_COMPILER_IS_TINYC)
# if defined(TCC_TARGET_I386)
# define TB_ARCH_x86
