Replace unnecessary ARM uses of <sys/linux-syscalls.h> with <asm/unistd.h>.

For some reason, socketcalls.c was only being compiled for ARM, where
it makes no sense. For x86 we generate stubs for the socket functions
that use __NR_socketcall directly.

Change-Id: I84181e6183fae2314ae3ed862276eba82ad21e8e
diff --git a/libc/arch-arm/bionic/_exit_with_stack_teardown.S b/libc/arch-arm/bionic/_exit_with_stack_teardown.S
index b00ea28..ac79d43 100644
--- a/libc/arch-arm/bionic/_exit_with_stack_teardown.S
+++ b/libc/arch-arm/bionic/_exit_with_stack_teardown.S
@@ -27,7 +27,7 @@
  */
 
 #include <machine/asm.h>
-#include <sys/linux-syscalls.h>
+#include <asm/unistd.h>
 
 // void _exit_with_stack_teardown(void* stackBase, int stackSize, int retCode)
 ENTRY(_exit_with_stack_teardown)
diff --git a/libc/arch-arm/bionic/clone.S b/libc/arch-arm/bionic/clone.S
index 281230c..01eb966 100644
--- a/libc/arch-arm/bionic/clone.S
+++ b/libc/arch-arm/bionic/clone.S
@@ -28,7 +28,7 @@
 
 #include <linux/err.h>
 #include <machine/asm.h>
-#include <sys/linux-syscalls.h>
+#include <asm/unistd.h>
 
 // int  __pthread_clone(void* (*fn)(void*), void* child_stack, int flags, void* arg);
 ENTRY(__pthread_clone)
diff --git a/libc/arch-arm/bionic/futex_arm.S b/libc/arch-arm/bionic/futex_arm.S
index bbd0629..e21a385 100644
--- a/libc/arch-arm/bionic/futex_arm.S
+++ b/libc/arch-arm/bionic/futex_arm.S
@@ -26,7 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/linux-syscalls.h>
+#include <asm/unistd.h>
 #include <machine/asm.h>
 
 #define FUTEX_WAIT 0
diff --git a/libc/arch-arm/bionic/syscall.S b/libc/arch-arm/bionic/syscall.S
index be9591e..510d298 100644
--- a/libc/arch-arm/bionic/syscall.S
+++ b/libc/arch-arm/bionic/syscall.S
@@ -28,7 +28,6 @@
 
 #include <linux/err.h>
 #include <machine/asm.h>
-#include <sys/linux-syscalls.h>
 
 ENTRY(syscall)
     mov     ip, sp