mips: move sysmips parser to a separate file

* sysmips.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* system.c: Fix typo in the check for <linux/utsname.h>.
Move inclusions of <linux/utsname.h> and <asm/sysmips.h> to sysmips.c.
[MIPS]: Likewise.
3 files changed