Specify "--hash-style=sysv" for libblasV8

Bug: 62135188

Test: mm
Test: make sure libblasV8.so has valid DT_HASH section instead of
just GNU_HASH.

Change-Id: If677c61ec787216a5d995b72dbb245df4645ebc0
diff --git a/Android.bp b/Android.bp
index b76c105..4e439d1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -179,6 +179,7 @@
     stl: "c++_static",
     ldflags: [
         "-Wl,--exclude-libs,libc++_static.a",
+        "-Wl,--hash-style=sysv",
     ],
     shared_libs: ["libdl"],
     static_libs: ["libF77blasV8"],