[MIPS64] Add missing MIPS64_CODEGEN flags

Change-Id: I891e6a5be4e6d3949f34c26a0db0f29f31e95261
diff --git a/libbcc-targets.mk b/libbcc-targets.mk
index c0ab482..31c9ff7 100644
--- a/libbcc-targets.mk
+++ b/libbcc-targets.mk
@@ -30,6 +30,7 @@
 
 LOCAL_CFLAGS_arm64 += -DFORCE_ARM64_CODEGEN -DARCH_ARM_HAVE_NEON -DARCH_ARM_HAVE_VFP -DARCH_ARM_HAVE_VFP_D32
 LOCAL_CFLAGS_mips += -DFORCE_MIPS_CODEGEN
+LOCAL_CFLAGS_mips64 += -DFORCE_MIPS64_CODEGEN
 
 LOCAL_CFLAGS_x86 += -DFORCE_X86_CODEGEN
 LOCAL_CFLAGS_x86_64 += -DFORCE_X86_64_CODEGEN