Add -Wl,-maarch64linux

The "-maarch64linux" switch is needed before aarch64-*4.8 is rebuilt with
backport of upstream patch, see https://android-review.googlesource.com/#/c/91099/

The existing ld.bfd is fine because it's configured to support
aarch64linux only.  ld.mcld (see https://android-review.googlesource.com/#/c/91047)
needs explicit emulation switch because it supports multiple targets

Change-Id: Idc1a491c5722ea9e26db917b667b1000bccc1f60
diff --git a/core/combo/TARGET_linux-arm64.mk b/core/combo/TARGET_linux-arm64.mk
index e894f6d..6bb3754 100644
--- a/core/combo/TARGET_linux-arm64.mk
+++ b/core/combo/TARGET_linux-arm64.mk
@@ -114,6 +114,7 @@
 			-Wl,-z,noexecstack \
 			-Wl,--warn-shared-textrel \
 			-Wl,--fatal-warnings \
+			-Wl,-maarch64linux \
 			$(arch_variant_ldflags)
 
 TARGET_GLOBAL_CPPFLAGS += -fvisibility-inlines-hidden