Add a "fork" of musl as //fusl.

fusl/arch/mips/bits/user.h

Index: fusl/arch/mips/bits/user.h
diff --git a/fusl/arch/mips/bits/user.h b/fusl/arch/mips/bits/user.h
new file mode 100644
index 0000000000000000000000000000000000000000..3e26249d307e80e52c915ba0b26f08269a4bf344
--- /dev/null
+++ b/fusl/arch/mips/bits/user.h
@@ -0,0 +1,13 @@
+struct user {
+	unsigned long regs[45+64];
+	unsigned long u_tsize, u_dsize, u_ssize;
+	unsigned long start_code, start_data, start_stack;
+	long signal;
+	void *u_ar0;
+	unsigned long magic;
+	char u_comm[32];
+};
+#define ELF_NGREG 45
+#define ELF_NFPREG 33
+typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
+typedef double elf_fpreg_t, elf_fpregset_t[ELF_NFPREG];