Remove the ___ hack.

Plain __ for generated syscalls didn't mean it was a hidden symbol, it
just meant "please don't use this". We added ___ to signify that a
hidden symbol should be generated, but then we added the map files
anyway so you now have to explicitly export symbols. Given that, this
convention serves no particular purpose so we may as well just use the
nicer names have everything look the same.

Test: treehugger
Change-Id: If424e17a49c36f4be545f5d283c4561a6ea9c7ea
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index e2ea065..e0fa16a 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -105,10 +105,10 @@
 ssize_t     __pwritev64:pwritev(int, const struct iovec*, int, long, long) lp32
 ssize_t     pwritev|pwritev64(int, const struct iovec*, int, off_t) lp64
 
-int         ___close:close(int)  all
+int         __close:close(int)  all
 pid_t       __getpid:getpid()  all
 int         munmap(void*, size_t)  all
-void*       ___mremap:mremap(void*, size_t, size_t, int, void*)  all
+void*       __mremap:mremap(void*, size_t, size_t, int, void*)  all
 int         msync(const void*, size_t, int)    all
 int         mprotect(const void*, size_t, int)  all
 int         madvise(void*, size_t, int)  all
@@ -123,7 +123,7 @@
 int         __fcntl64:fcntl64(int, int, void*)  lp32
 int         fcntl(int, int, void*)  lp64
 int         flock(int, int)   all
-int         ___fchmod:fchmod(int, mode_t)  all
+int         __fchmod:fchmod(int, mode_t)  all
 int         dup(int)  all
 int         pipe2(int*, int) all
 int         dup3(int, int, int)   all
@@ -133,16 +133,16 @@
 int         fchown:fchown(int, uid_t, gid_t)    arm64,mips,mips64,x86_64
 void        sync(void)  all
 int         syncfs(int)  all
-int         ___fsetxattr:fsetxattr(int, const char*, const void*, size_t, int) all
-ssize_t     ___fgetxattr:fgetxattr(int, const char*, void*, size_t) all
-ssize_t     ___flistxattr:flistxattr(int, char*, size_t) all
+int         __fsetxattr:fsetxattr(int, const char*, const void*, size_t, int) all
+ssize_t     __fgetxattr:fgetxattr(int, const char*, void*, size_t) all
+ssize_t     __flistxattr:flistxattr(int, char*, size_t) all
 int         fremovexattr(int, const char*) all
 
 int __getdents64:getdents64(unsigned int, struct dirent*, unsigned int)   arm,arm64,mips,mips64,x86,x86_64
 
 int __openat:openat(int, const char*, int, mode_t) all
-int ___faccessat:faccessat(int, const char*, int)  all
-int ___fchmodat:fchmodat(int, const char*, mode_t)  all
+int __faccessat:faccessat(int, const char*, int)  all
+int __fchmodat:fchmodat(int, const char*, mode_t)  all
 int fchownat(int, const char*, uid_t, gid_t, int)  all
 int fstatat64|fstatat:fstatat64(int, const char*, struct stat*, int)   lp32
 int fstatat64|fstatat:newfstatat(int, const char*, struct stat*, int)  arm64,x86_64
@@ -213,7 +213,7 @@
 clock_t       times(struct tms*)       all
 int           nanosleep(const struct timespec*, struct timespec*)   all
 int           clock_settime(clockid_t, const struct timespec*)  all
-int           ___clock_nanosleep:clock_nanosleep(clockid_t, int, const struct timespec*, struct timespec*)  all
+int           __clock_nanosleep:clock_nanosleep(clockid_t, int, const struct timespec*, struct timespec*)  all
 int           getitimer(int, const struct itimerval*)   all
 int           setitimer(int, const struct itimerval*, struct itimerval*)  all
 int           __timer_create:timer_create(clockid_t clockid, struct sigevent* evp, __kernel_timer_t* timerid)    all
@@ -234,7 +234,7 @@
 int     __rt_sigprocmask:rt_sigprocmask(int, const sigset64_t*, sigset64_t*, size_t)  all
 int     __rt_sigsuspend:rt_sigsuspend(const sigset64_t*, size_t)  all
 int     __rt_sigtimedwait:rt_sigtimedwait(const sigset64_t*, siginfo_t*, const timespec*, size_t)  all
-int     ___rt_sigqueueinfo:rt_sigqueueinfo(pid_t, int, siginfo_t*)  all
+int     __rt_sigqueueinfo:rt_sigqueueinfo(pid_t, int, siginfo_t*)  all
 int     __signalfd4:signalfd4(int, const sigset64_t*, size_t, int)  all
 
 # sockets