Fix pattern to account for '_' prefix in syscalls

Bug: http://b/64549471
Test: make
Change-Id: I7ba856a2cad29adbb028f150aeaabb9894e84d6e
diff --git a/libc/include/bits/glibc-syscalls.h b/libc/include/bits/glibc-syscalls.h
index 3f99dcb..f08c614 100644
--- a/libc/include/bits/glibc-syscalls.h
+++ b/libc/include/bits/glibc-syscalls.h
@@ -1,6 +1,15 @@
 /* Generated by gensyscalls.py. Do not edit. */
 #ifndef _BIONIC_BITS_GLIBC_SYSCALLS_H_
 #define _BIONIC_BITS_GLIBC_SYSCALLS_H_
+#if defined(__NR__llseek)
+  #define SYS__llseek __NR__llseek
+#endif
+#if defined(__NR__newselect)
+  #define SYS__newselect __NR__newselect
+#endif
+#if defined(__NR__sysctl)
+  #define SYS__sysctl __NR__sysctl
+#endif
 #if defined(__NR_accept)
   #define SYS_accept __NR_accept
 #endif