enable clone system call for x86

Add __bionic_clone function for x86, which will be
used for clone system call.

Change-Id: I889dc9bf4b7ebb4358476e17e6f3233e26491f4d
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Xiaokang Qin <xiaokang.qin@intel.com>
Signed-off-by: Beare, Bruce J <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 51414
diff --git a/libc/Android.mk b/libc/Android.mk
index 51cef8a..c66ec59 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -261,6 +261,7 @@
 	tzcode/strftime.c \
 	tzcode/strptime.c \
 	bionic/__set_errno.c \
+	bionic/bionic_clone.c \
 	bionic/cpuacct.c \
 	bionic/arc4random.c \
 	bionic/basename.c \
@@ -361,7 +362,6 @@
 # =========================================================
 ifeq ($(TARGET_ARCH),arm)
 libc_common_src_files += \
-	bionic/bionic_clone.c \
 	arch-arm/bionic/__get_pc.S \
 	arch-arm/bionic/__get_sp.S \
 	arch-arm/bionic/_exit_with_stack_teardown.S \
@@ -451,7 +451,6 @@
 
 ifeq ($(TARGET_ARCH),mips)
 libc_common_src_files += \
-	bionic/bionic_clone.c \
 	arch-mips/bionic/__get_sp.S \
 	arch-mips/bionic/__get_tls.c \
 	arch-mips/bionic/__set_tls.c \