Add paths to apk!lib/<abi> to LD_LIBRARY_PATH

  Add paths to .apk to LD_LIBRARY_PATH to enable
  bionic linker's "open from zip-file" feature.

Bug: 8076853
Change-Id: I1aa2c039bb2a590ae72f256acc9ba5401c2c59b1
diff --git a/runtime/runtime_options.def b/runtime/runtime_options.def
index 8775f8d..6401d44 100644
--- a/runtime/runtime_options.def
+++ b/runtime/runtime_options.def
@@ -104,6 +104,7 @@
                                           ImageCompilerOptions)  // -Ximage-compiler-option ...
 RUNTIME_OPTIONS_KEY (bool,                Verify,                         true)
 RUNTIME_OPTIONS_KEY (std::string,         NativeBridge)
+RUNTIME_OPTIONS_KEY (std::string,         CpuAbiList)
 
 // Not parse-able from command line, but can be provided explicitly.
 RUNTIME_OPTIONS_KEY (const std::vector<const DexFile*>*, \