Update acov script to handle new coverage file locations.

Test: Build with native coverage and run acov, check report contents.
Change-Id: I47afd35216cfcc7df7da2378cccdf8dba23bd8e2
diff --git a/scripts/llvm-gcov b/scripts/llvm-gcov
new file mode 100755
index 0000000..498c724
--- /dev/null
+++ b/scripts/llvm-gcov
@@ -0,0 +1,3 @@
+#!/bin/bash
+# Wrapper script around 'llvm-cov gcov'.
+exec llvm-cov gcov $@