Fix strcpy implementation and trie


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9338 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/runtime/GCCLibraries/libc/string.c b/runtime/GCCLibraries/libc/string.c
index bc262a5..0ed4ced 100644
--- a/runtime/GCCLibraries/libc/string.c
+++ b/runtime/GCCLibraries/libc/string.c
@@ -23,8 +23,9 @@
 }
 
 char *strcpy(char *s1, const char *s2) {
+  char *dest = s1;
   while ((*s1++ = *s2++));
-  return s1;
+  return dest;
 }
 
 char *strcat(char *s1, const char *s2) {