Resolve conflict in naming of ahat module and file

Bazel doesn't allow a module and file to have the same
name, so rename ahat to ahat.sh

Bug: 198619163
Test: m ahat; out/host/linux-x86/bin/ahat
Change-Id: Iebe4320176ac27a76a90e244b05598cee1ff62c0
diff --git a/tools/ahat/Android.bp b/tools/ahat/Android.bp
index affa2e0..5f6ba81 100644
--- a/tools/ahat/Android.bp
+++ b/tools/ahat/Android.bp
@@ -27,7 +27,7 @@
     visibility: [
         "//libcore/metrictests/memory/host",
     ],
-    wrapper: "ahat",
+    wrapper: "ahat.sh",
     srcs: ["src/main/**/*.java"],
     manifest: "etc/ahat.mf",
     java_resources: ["etc/style.css"],
diff --git a/tools/ahat/ahat b/tools/ahat/ahat.sh
similarity index 100%
rename from tools/ahat/ahat
rename to tools/ahat/ahat.sh