Do not check pkg-config when cross-compiling for android

[sagudev]

Currently when compiling for android/haiku target we check pkg-config
for zlib then fallback to using shipped zlib,
this can cause problems as pkg-config sometimes returns host's zlib.

This patch makes it to always use shipped zlib instead of pkg-config one (moves target.contains("android") check before pkg-config check).

[sagudev]

CI has some network issues

[Byron]

Could you provide a motivation for this change either as commit message, as in-code comment, or a combination of both?

Thank you!

[Byron]

Could you spell out everything in the commit message, like I am 3 years old?
The current explanation doesn’t tell me much. Imagine someone who has no background in this.
Thanks again

[sagudev]

In case commit message is still unclear, you can also edit it yourself (I always Allow edits by maintainers).

[Byron]

I really meant the 'please explain it like I am 3' because I wouldn't know how to improve it - it's entirely unclear to me, I have no context.

[sagudev]

But it is ok now? (There was a force push between #199 (comment) and #199 (comment))

[Byron]

Thanks a lot, I understand what's going on now and can confirm that the change makes sense to accomplish this goal (without having tested or otherwise validated it).