Refresh aarch64-gdb to 7.7.

BUG: 13509533
Change-Id: Ibd77a6ebb024e8123dc7e76e2a449da0a6d746d5
diff --git a/bin/aarch64-linux-android-gdb b/bin/aarch64-linux-android-gdb
index 158d5d1..4a77133 100755
--- a/bin/aarch64-linux-android-gdb
+++ b/bin/aarch64-linux-android-gdb
Binary files differ