11113247c3 depends: Support for S390X targets (MarcoFalke)
989fd539d5 depends: Support for 64-bit POWER targets (Luke Dashjr)
Pull request description:
Failure before:
```
$ make -C depends HOST=powerpc64-linux-gnu
...
ERROR: Feature 'system-zlib' was enabled, but the pre-condition 'libs.zlib' failed.
ERROR: Feature 'xcb' was enabled, but the pre-condition 'libs.xcb' failed.
ERROR: Feature 'system-freetype' was enabled, but the pre-condition 'features.freetype && libs.freetype' failed.
ERROR: Feature 'fontconfig' was enabled, but the pre-condition '!config.win32 && !config.darwin && features.system-freetype && libs.fontconfig' failed.
make: *** [funcs.mk:254: /bitcoin/depends/work/build/powerpc64-linux-gnu/qt/5.9.8-95548079095/qtbase/.stamp_configured] Error 3
$ make -C depends HOST=s390x-linux-gnu
...
ERROR: Feature 'system-zlib' was enabled, but the pre-condition 'libs.zlib' failed.
ERROR: Feature 'xcb' was enabled, but the pre-condition 'libs.xcb' failed.
ERROR: Feature 'system-freetype' was enabled, but the pre-condition 'features.freetype && libs.freetype' failed.
ERROR: Feature 'fontconfig' was enabled, but the pre-condition '!config.win32 && !config.darwin && features.system-freetype && libs.fontconfig' failed.
make: *** [funcs.mk:254: /bitcoin/depends/work/build/s390x-linux-gnu/qt/5.9.8-79c6d6ca6ec/qtbase/.stamp_configured] Error 3
```
ACKs for top commit:
laanwj:
Code review ACK 11113247c3
dongcarl:
tested ACK 11113247c3
practicalswift:
ACK 11113247c3 -- diff looks correct
Tree-SHA512: f990101ced0ed579168bb25762c1296c9b512c597bab924013af41832670a69ed786c6ec9b654c95fe064187797880a66c575395bc102a914c1bdb323ca7538a
1d6fda65dd