Add 4 tags in LLVMWrap.

    * kAndroidBitcodeType
      Generate this bitcode for shared object or executable.

    * kAndroidSOName
      Store DT_SONAME for this bitcode.

    * kAndroidDependLibrary
      Store list of dependent library for this bitcode.

    * kAndroidLDFlags
      Store linker flags for this bitcode.

Change-Id: Ie202aadc35b764f45a84e70c248a0ffc8ca5110a