Add support for the utimensat(2) syscall to bionic.

The kernel has supported this syscall for quite some time now,
but bionic did not.  Now that there is a need for it, let's
add it to bionic.

Change-Id: Ifcef3e46f1438d79435b600c4e6063857ab16903
diff --git a/libc/arch-sh/syscalls.mk b/libc/arch-sh/syscalls.mk
index 9575905..1d87600 100644
--- a/libc/arch-sh/syscalls.mk
+++ b/libc/arch-sh/syscalls.mk
@@ -127,6 +127,7 @@
 syscall_src += arch-sh/syscalls/__timer_getoverrun.S
 syscall_src += arch-sh/syscalls/__timer_delete.S
 syscall_src += arch-sh/syscalls/utimes.S
+syscall_src += arch-sh/syscalls/utimensat.S
 syscall_src += arch-sh/syscalls/sigaction.S
 syscall_src += arch-sh/syscalls/sigprocmask.S
 syscall_src += arch-sh/syscalls/__sigsuspend.S
diff --git a/libc/arch-sh/syscalls/utimensat.S b/libc/arch-sh/syscalls/utimensat.S
new file mode 100644
index 0000000..28e7ec6
--- /dev/null
+++ b/libc/arch-sh/syscalls/utimensat.S
@@ -0,0 +1,32 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+    .text
+    .type utimensat, @function
+    .globl utimensat
+    .align 4
+
+utimensat:
+
+    /* invoke trap */
+    mov.l   0f, r3  /* trap num */
+    trapa   #(4 + 0x10)
+
+    /* check return value */
+    cmp/pz  r0
+    bt      __NR_utimensat_end
+
+    /* keep error number */
+    sts.l   pr, @-r15
+    mov.l   1f, r1
+    jsr     @r1
+    mov     r0, r4
+    lds.l   @r15+, pr
+
+__NR_utimensat_end:
+    rts
+    nop
+
+    .align  2
+0:  .long   __NR_utimensat
+1:  .long   __set_syscall_errno