Deprecate older API uses of prebuilt_cxx_library

Summary:
Use the `deprecated_prebuilt_cxx_library` wrapper instead of the deprecated
API of `prebuilt_cxx_library`.

Reviewed By: ttsugriy

Differential Revision: D5878523

fbshipit-source-id: 2c8c1fd1d19597ff7459bbd527c89573520db74b

lib/fb/BUCK

@@ -22,6 +22,8 @@ prebuilt_cxx_library(
 cxx_library(
     name = "fbjni",
     srcs = glob(["src/main/cpp/**/*.cpp"]),
+    header_namespace = "",
+    exported_headers = subdir_glob([("src/main/cpp/include", "**/*.h")]),
     compiler_flags = [
         "-DLOG_TAG=\"libfb\"",
         "-DDISABLE_CPUCAP",
@@ -35,8 +37,6 @@ cxx_library(
         "-Wno-unused-parameter",
         "-std=c++11",
     ],
-    exported_headers = subdir_glob([("src/main/cpp/include", "**/*.h")]),
-    header_namespace = "",
     visibility = ["PUBLIC"],
     deps = [
         ":ndklog",