LP64 shouldn't include the non-standard <time64.h> cruft.

This patch includes just enough to keep external/chromium_org building
until they switch 64-bit Android over to using the regular non-Android code.

Change-Id: Iecaf274efa46ae18a42d5e3439c5aa4f909177c1
diff --git a/libc/arch-mips/mips.mk b/libc/arch-mips/mips.mk
index 1af4a65..53fa223 100644
--- a/libc/arch-mips/mips.mk
+++ b/libc/arch-mips/mips.mk
@@ -4,6 +4,7 @@
 libc_common_src_files_mips := \
     bionic/legacy_32_bit_support.cpp \
     bionic/ndk_cruft.cpp \
+    bionic/time64.c \
 
 # These are shared by all the 32-bit targets, but not the 64-bit ones.
 libc_bionic_src_files_mips += \