Build sdk variants of libc++ for riscv64 am: 69c72cf1ae

Original change: https://android-review.googlesource.com/c/platform/external/libcxx/+/2404996

Change-Id: I051e1c644b0aaa55f33520271078e374ba820c3f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/Android.bp b/Android.bp
index 648a7df..5191017 100644
--- a/Android.bp
+++ b/Android.bp
@@ -96,6 +96,10 @@
     ],
     // being part of updatable apexes, this should work on older releases
     min_sdk_version: "apex_inherit",
+    // sdk_version normally isn't needed as only the platform variant
+    // is used, except on riscv64 which doesn't have an NDK libc++ and
+    // reuses this module for sdk variants.
+    sdk_version: "current",
     native_bridge_supported: true,
     srcs: [
         "src/algorithm.cpp",
@@ -161,6 +165,10 @@
     ],
     // being part of updatable apexes, this should work on older releases
     min_sdk_version: "apex_inherit",
+    // sdk_version normally isn't needed as only the platform variant
+    // is used, except on riscv64 which doesn't have an NDK libc++ and
+    // reuses this module for sdk variants.
+    sdk_version: "current",
     whole_static_libs: ["libc++_static"],
     stl: "none",