Merge "String8: ensure static init done prior to empty string reference"

static inline char* getEmptyString()

{

    if (!gEmptyStringBuf) initialize_string8();

    gEmptyStringBuf->acquire();

    return gEmptyString;

}

void initialize_string8()

{

    if (gEmptyStringBuf) return;

    // HACK: This dummy dependency forces linking libutils Static.cpp,

    // which is needed to initialize String8/String16 classes.

    // These variables are named for Darwin, but are needed elsewhere too,