Load library using file handle.

* This patch enables dlopen by file descriptor
   instead of path/name.

Bug: 15984217
Change-Id: Ib39051e00567fb97070bf96d8ce63993877c0a01

linker/linker_phdr.cpp

@@ -127,9 +127,6 @@ ElfReader::ElfReader(const char* name, int fd)
 }
 
 ElfReader::~ElfReader() {
-  if (fd_ != -1) {
-    close(fd_);
-  }
   if (phdr_mmap_ != NULL) {
     munmap(phdr_mmap_, phdr_size_);
   }