Build and run tests during bootstrap

Change-Id: If40489d74136af4d15d4ff26210a50975a462497

Android.bp

@@ -113,6 +113,9 @@ bootstrap_go_package {
         "cc/x86_darwin_host.go",
         "cc/x86_linux_host.go",
     ],
+    testSrcs: [
+        "cc/cc_test.go",
+    ],
 }
 
 bootstrap_go_package {
@@ -180,6 +183,9 @@ bootstrap_go_package {
         "androidmk/parser/parser.go",
         "androidmk/parser/scope.go",
     ],
+    testSrcs: [
+        "androidmk/parser/make_strings_test.go",
+    ],
 }
 
 bootstrap_go_binary {