Add aarch64-gcc prebuilt.

Change-Id: I028f986d3a62d37c641087a040df1fc41ff1dff2
diff --git a/aarch64-linux-android/lib/ldscripts/aarch64elfb.xu b/aarch64-linux-android/lib/ldscripts/aarch64elfb.xu
new file mode 100644
index 0000000..12b1142
--- /dev/null
+++ b/aarch64-linux-android/lib/ldscripts/aarch64elfb.xu
@@ -0,0 +1,147 @@
+/* Script for ld -Ur: link w/out relocation, do create constructors */
+OUTPUT_FORMAT("elf64-bigaarch64", "elf64-bigaarch64",
+	      "elf64-littleaarch64")
+OUTPUT_ARCH(aarch64)
+ /* For some reason, the Solaris linker makes bad executables
+  if gld -r is used and the intermediate file has sections starting
+  at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
+  bug.  But for now assigning the zero vmas works.  */
+SECTIONS
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