Remove test_per_src from build/kati

test_per_src is being removed, it never worked well and is incompatible
with all of the test infrastructure.  Build the kati test binaries
individually.

Test: prebuilts/build-tools/build-prebuilts.sh
Change-Id: I7a51c4a9553897fa2b8273db953d616842b933fc
diff --git a/src/Android.bp b/src/Android.bp
index f0723f9..82c5cdc 100644
--- a/src/Android.bp
+++ b/src/Android.bp
@@ -77,14 +77,25 @@
 }
 
 cc_test_host {
-    name: "ckati_test",
+    name: "ckati_find_test",
     defaults: ["ckati_defaults"],
-    test_per_src: true,
-    srcs: [
-        "find_test.cc",
-        "ninja_test.cc",
-        "strutil_test.cc",
-    ],
+    srcs: ["find_test.cc"],
+    gtest: false,
+    static_libs: ["libckati"],
+}
+
+cc_test_host {
+    name: "ckati_ninja_test",
+    defaults: ["ckati_defaults"],
+    srcs: ["ninja_test.cc"],
+    gtest: false,
+    static_libs: ["libckati"],
+}
+
+cc_test_host {
+    name: "ckati_strutil_test",
+    defaults: ["ckati_defaults"],
+    srcs: ["strutil_test.cc"],
     gtest: false,
     static_libs: ["libckati"],
 }