Use __RENAME for long double functions.

We can cut a lot of stuff out of the NDK's libandroid_support with this,
and reduce unnecessary relocations for all LP32 code. LP64 code should
be unaffected.

Bug: https://issuetracker.google.com/64450768
Bug: https://github.com/android-ndk/ndk/issues/507
Test: ran tests, plus manual readelf on the _test.o files
Change-Id: I3de6015921195304ea9c829ef31665cd34664066
diff --git a/libc/bionic/wcstod.cpp b/libc/bionic/wcstod.cpp
index f7bd433..41df854 100644
--- a/libc/bionic/wcstod.cpp
+++ b/libc/bionic/wcstod.cpp
@@ -26,6 +26,8 @@
  * SUCH DAMAGE.
  */
 
+#define __BIONIC_LP32_USE_LONG_DOUBLE
+
 #include <wchar.h>
 
 #include <stdlib.h>