Revert "Revert "Restore posix_memalign""

This reverts commit 78a3069f827386df6166ccf9366a89be782f1dde.
diff --git a/libc/bionic/malloc_debug_common.c b/libc/bionic/malloc_debug_common.c
index 9333de9..2f4e55b 100644
--- a/libc/bionic/malloc_debug_common.c
+++ b/libc/bionic/malloc_debug_common.c
@@ -210,6 +210,11 @@
     return dlpvalloc(bytes);
 }
 
+int posix_memalign(void** memptr, size_t alignment, size_t size)
+{
+    return dlposix_memalign(memptr, alignment, size);
+}
+
 /* Support for malloc debugging.
  * Note that if USE_DL_PREFIX is not defined, it's assumed that memory
  * allocation routines are implemented somewhere else, so all our custom