Add new build rule for running dtc on Android

dtc_static links libfdt statically for simpler test setup.
Otherwise libfdt.so should be manually pushed.
(tested with data, data_bins, and required with rust_test target)

Change-Id: Ic975258c7e0030cbeeb5c8c0df611d8aa439b3c8
Test: Manually

Android.bp

@@ -66,16 +66,20 @@ cc_defaults {
     shared_libs: ["libfdt"],
 
     stl: "none",
-    dist: {
-        targets: [
-            "dist_files",
-        ],
-        dir: "dtc",
+    target: {
+        host: {
+            dist: {
+                targets: [
+                    "dist_files",
+                ],
+                dir: "dtc",
+            },
+        },
     },
 }
 
-cc_binary_host {
-    name: "dtc",
+cc_defaults {
+    name: "dtc_defaults",
     defaults: ["dt_defaults"],
     srcs: [
         "checks.c",
@@ -92,6 +96,18 @@ cc_binary_host {
     ],
 }
 
+cc_binary {
+    name: "dtc_static",
+    defaults: ["dtc_defaults"],
+    static_executable: true,
+    installable: false, // test only
+}
+
+cc_binary_host {
+    name: "dtc",
+    defaults: ["dtc_defaults"],
+}
+
 cc_binary_host {
     name: "fdtget",
     defaults: ["dt_defaults"],