Correction for the fix for Bug 3508 - Persistent storage support breaks Linux compatibility. A 2nd `make install' will fail attempting to create symlink libnvmemmory.so already created by 1st install. Install should pre-emptively delete it.

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# QEMU SYBORG ESTART.TXT
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D:  0  ELOCAL  FAT   0       FS_FORMAT_COLD,FS_SYNC_DRIVE       # IRAM
C:  1  ELOCAL  FAT   0       FS_FORMAT_CORRUPT,FS_NOT_RUGGED    # NVMEM