Remove __overloadable/__RENAME_CLANG

Now that we have a clang that supports transparent overloads, we can
kill all of this cruft, and restore our upstream sources to their
untouched glory. Woohoo!

Bug: 12231437
Test: Built aosp_marlin; no obvious patch-related aosp_mips issues.
Change-Id: I520a19d014f12137f80e43f973dccd6711c571cd
diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index be07007..27952b9 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -348,11 +348,8 @@
  */
 #if defined(__clang__) && defined(__BIONIC_FORTIFY)
 #  define __overloadable __attribute__((overloadable))
-/* We don't use __RENAME directly because on gcc this could result in unnecessary renames. */
-#  define __RENAME_CLANG(x) __RENAME(x)
 #else
 #  define __overloadable
-#  define __RENAME_CLANG(x)
 #endif
 
 /* Used to tag non-static symbols that are private and never exposed by the shared library. */
diff --git a/libc/include/sys/socket.h b/libc/include/sys/socket.h
index 152f39d..bbde88b 100644
--- a/libc/include/sys/socket.h
+++ b/libc/include/sys/socket.h
@@ -315,12 +315,11 @@
 __socketcall int socket(int __af, int __type, int __protocol);
 __socketcall int socketpair(int __af, int __type, int __protocol, int __fds[2]);
 
-ssize_t recv(int __fd, void* __buf, size_t __n, int __flags) __overloadable __RENAME_CLANG(recv);
-ssize_t send(int __fd, const void* __buf, size_t __n, int __flags) __overloadable __RENAME_CLANG(send);
+ssize_t recv(int __fd, void* __buf, size_t __n, int __flags);
+ssize_t send(int __fd, const void* __buf, size_t __n, int __flags);
 
-__socketcall ssize_t sendto(int __fd, const void* __buf, size_t __n, int __flags, const struct sockaddr* __dst_addr, socklen_t __dst_addr_length)
-        __overloadable __RENAME_CLANG(sendto);
-__socketcall ssize_t recvfrom(int __fd, void* __buf, size_t __n, int __flags, struct sockaddr* __src_addr, socklen_t* __src_addr_length) __overloadable __RENAME_CLANG(recvfrom);
+__socketcall ssize_t sendto(int __fd, const void* __buf, size_t __n, int __flags, const struct sockaddr* __dst_addr, socklen_t __dst_addr_length);
+__socketcall ssize_t recvfrom(int __fd, void* __buf, size_t __n, int __flags, struct sockaddr* __src_addr, socklen_t* __src_addr_length);
 
 #if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS)
 #include <bits/fortify/socket.h>
diff --git a/libc/include/sys/stat.h b/libc/include/sys/stat.h
index 14b5224..6fce0a5 100644
--- a/libc/include/sys/stat.h
+++ b/libc/include/sys/stat.h
@@ -165,7 +165,7 @@
 int stat64(const char* __path, struct stat64* __buf) __INTRODUCED_IN(21);
 
 int mknod(const char* __path, mode_t __mode, dev_t __dev);
-mode_t umask(mode_t __mask) __overloadable __RENAME_CLANG(umask);
+mode_t umask(mode_t __mask);
 
 #if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS)
 #include <bits/fortify/stat.h>