I am using the out-of-the-box PDFReader demo app as it is packaged in the download. I changed absolutely nothing.
I checked the APK, and the .so files are there for both x86 and x86-64, In the lLogCat entry, you can see it loading the library.
FWIW: I'm running on an AMD x6 1090T processor. Maybe it works on an i7?
I've attached the single PDF file I have in the directory - but it doesn't matter: I've tried a bunch of different types of PDF files - same results.
04-22 16:03:33.566: I/System.out(1540): debugger has settled (1462)
04-22 16:03:33.574: D/dalvikvm(1540): Trying to load lib /data/app-lib/com.radaee.reader-2/librdpdf.so 0x94f52798
04-22 16:03:33.574: D/dalvikvm(1540): Added shared lib /data/app-lib/com.radaee.reader-2/librdpdf.so 0x94f52798
04-22 16:03:33.678: D/dalvikvm(1540): GC_FOR_ALLOC freed 84K, 6% free 3078K/3260K, paused 3ms, total 3ms
04-22 16:03:33.838: D/(1540): HostConnection::get() New Host Connection established 0xb823a138, tid 1540
04-22 16:03:45.198: A/libc(1540): Fatal signal 4 (SIGILL) at 0x7f381034 (code=2), thread 1563 (Thread-96)