RFR: 8333795: [mobile] allow building jdk native libs for ios/android [v2]

[Johan Vos]

> This PR contains the changes that are needed to build the native JDK class libraries for ios/android.
> After a successful configuration, invoking
> `make static-libs`
> should produces static libs for the JDK classes.

Johan Vos has updated the pull request incrementally with one additional commit since the last revision:

  Fix typo

-------------

Changes:
  - all: https://git.openjdk.org/mobile/pull/26/files
  - new: https://git.openjdk.org/mobile/pull/26/files/f94a8777..6c67b5d7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=mobile&pr=26&range=01
 - incr: https://webrevs.openjdk.org/?repo=mobile&pr=26&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/mobile/pull/26.diff
  Fetch: git fetch https://git.openjdk.org/mobile.git pull/26/head:pull/26

PR: https://git.openjdk.org/mobile/pull/26