Remove unnecessary indirection for execve() and _exit()/_Exit().

This was added in 3031a7e45eb992d466610bec3bb589c41b74992b for memtag_stack, but made obsolete by b6a592b25b1f81ff316cb90c4b76736e77bf37f9.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6c4fb2a8e919b34e245f8d031c6159abb7551df4)
Merged-In: If89cff1592663d04396a40b1c2dcff1c96c04744
Change-Id: If89cff1592663d04396a40b1c2dcff1c96c04744
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index a8c70e5..182de17 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -65,7 +65,7 @@
 int tgkill(pid_t tgid, pid_t tid, int sig) all
 
 void* __brk:brk(void*) all
-int __execve:execve(const char*, char* const*, char* const*)  all
+int execve(const char*, char* const*, char* const*)  all
 int __ptrace:ptrace(int request, int pid, void* addr, void* data) all
 
 # <sys/resource.h>
@@ -330,7 +330,7 @@
 
 int __eventfd:eventfd2(unsigned int, int)  all
 
-void __exit_group:exit_group(int)  all
+void _exit|_Exit:exit_group(int)  all
 void __exit:exit(int)  all
 
 int inotify_init1(int)  all