Install: support android platform

[cbix]

Just tried npm install from termux where node's os.platform() returns android. It failed in sentry's postinstall step due to the platform not being supported.

The linux binary should work out of the box since it's statically linked.

[szokeasaurusrex]

@cbix thanks for opening this issue. Do any of the other install methods work for you on Android?

[cbix]

Manual install works, but inside my package npm install still fails because it has @sentry/cli as dependency where the postinstall script fails.

[szokeasaurusrex]

@cbix got it, thanks