Name function arguments in libc headers for Studio.

Second batch of headers...

Bug: http://b/64613623
Test: builds
Change-Id: I8eef043dbf32afee8ff814e9d005f46aee8fa21f
diff --git a/libc/include/sys/sysinfo.h b/libc/include/sys/sysinfo.h
index 9a10d64..6da02ee 100644
--- a/libc/include/sys/sysinfo.h
+++ b/libc/include/sys/sysinfo.h
@@ -25,6 +25,7 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
+
 #ifndef _SYS_SYSINFO_H_
 #define _SYS_SYSINFO_H_
 
@@ -33,16 +34,12 @@
 
 __BEGIN_DECLS
 
-int sysinfo(struct sysinfo* info);
-
+int sysinfo(struct sysinfo* __info);
 int get_nprocs_conf(void) __INTRODUCED_IN(23);
-
 int get_nprocs(void) __INTRODUCED_IN(23);
-
 long get_phys_pages(void) __INTRODUCED_IN(23);
-
 long get_avphys_pages(void) __INTRODUCED_IN(23);
 
 __END_DECLS
 
-#endif /* _SYS_SYSINFO_H_ */
+#endif