Remove bogus transitive includes.

<signal.h> shouldn't get you the contents of <errno.h>, and <fcntl.h>
shouldn't get you the contents of <unistd.h>.

Change-Id: I347499cd8671bfee98e6b8e875a97cab3a3655d3

libc/bionic/bionic_systrace.cpp

@@ -15,6 +15,7 @@
  */
 
 #include <cutils/trace.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>

libc/bionic/chown.cpp

@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 int chown(const char* path, uid_t uid, gid_t gid) {
   return fchownat(AT_FDCWD, path, uid, gid, 0);

libc/bionic/lchown.cpp

@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 int lchown(const char* path, uid_t uid, gid_t gid) {
   return fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW);

libc/bionic/poll.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <sys/poll.h>
 #include <sys/select.h>
 

libc/bionic/raise.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <pthread.h>
 #include <signal.h>
 

libc/bionic/readlink.cpp

@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 ssize_t readlink(const char* path, char* buf, size_t size) {
   return readlinkat(AT_FDCWD, path, buf, size);

libc/bionic/sigaddset.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigaddset(sigset_t* set, int signum) {

libc/bionic/sigdelset.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigdelset(sigset_t* set, int signum) {

libc/bionic/sigemptyset.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigemptyset(sigset_t* set) {

libc/bionic/sigfillset.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigfillset(sigset_t* set) {

libc/bionic/sigismember.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigismember(const sigset_t* set, int signum) {

libc/bionic/termios.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <termios.h>
 #include <unistd.h>
 

libc/bionic/utimes.cpp

@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/time.h>

libc/include/fcntl.h

@@ -35,7 +35,6 @@
 #include <linux/fcntl.h>
 #include <linux/stat.h>
 #include <linux/uio.h>
-#include <unistd.h>  /* this is not required, but makes client code much happier */
 
 __BEGIN_DECLS
 

libc/include/signal.h

@@ -30,7 +30,6 @@
 #define _SIGNAL_H_
 
 #include <asm/sigcontext.h>
-#include <errno.h>
 #include <limits.h>
 #include <machine/pthread_types.h>
 #include <machine/timespec.h>

libc/upstream-netbsd/android/include/fd_setsize.h

@@ -0,0 +1 @@
+#include <sys/select.h>