debug/elf: make check for empty symbol section consistent for 64-bit and 32-bit binaries

[adityasaky]

The check for whether a binary's symbols section is empty is
inconsistent across the 32-bit and 64-bit flows.

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Patch Set 1:

(1 comment)

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Patch Set 1:

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Message from Aditya Sirish A Yelgundhalli:

Patch Set 2:

(1 comment)

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Message from Florian Lehner:

Patch Set 3: Code-Review+1

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Message from Aditya Sirish A Yelgundhalli:

Patch Set 3:

(1 comment)

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Message from Ian Lance Taylor:

Patch Set 3:

(1 comment)

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