Move rkp_factory_extraction_tool dist dir to "rkp"

We will be publishing more tools for partners, and they should live
together. With that in mind, move the rkp_factory_extraction_tool dist
to "rkp/" instead of "rkp_factory_extraction_tool/".

Test: Built it
Change-Id: Ic86fe555a75dfe12a4cae1b4be48c33bae95ecbb
diff --git a/provisioner/Android.bp b/provisioner/Android.bp
index 5c1956c..605abb4 100644
--- a/provisioner/Android.bp
+++ b/provisioner/Android.bp
@@ -95,22 +95,22 @@
     target: {
         android_arm: {
             dist: {
-                dir: "rkp_factory_extraction_tool/arm",
+                dir: "rkp/arm",
             },
         },
         android_arm64: {
             dist: {
-                dir: "rkp_factory_extraction_tool/arm64",
+                dir: "rkp/arm64",
             },
         },
         android_x86: {
             dist: {
-                dir: "rkp_factory_extraction_tool/x86",
+                dir: "rkp/x86",
             },
         },
         android_x86_64: {
             dist: {
-                dir: "rkp_factory_extraction_tool/x86_64",
+                dir: "rkp/x86_64",
             },
         },
     },