Fix mips64 crt build.

This was broken during the multi-arch makefile changes.

Change-Id: Id25cf3273f63c11fbca1cff944fc5e1bf765c636
diff --git a/libc/arch-mips64/mips64.mk b/libc/arch-mips64/mips64.mk
index 96ee66d..11ceb40 100644
--- a/libc/arch-mips64/mips64.mk
+++ b/libc/arch-mips64/mips64.mk
@@ -62,10 +62,10 @@
 
 libc_crt_target_cflags_mips64 := \
     $($(my_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
-    -I$(LOCAL_PATH)/arch-mips/include
+    -I$(LOCAL_PATH)/arch-mips64/include
 
 libc_crt_target_crtbegin_file_mips64 := \
-    $(LOCAL_PATH)/arch-mips/bionic/crtbegin.c
+    $(LOCAL_PATH)/arch-mips64/bionic/crtbegin.c
 
 libc_crt_target_crtbegin_so_file_mips64 := \
     $(LOCAL_PATH)/arch-common/bionic/crtbegin_so.c