Merge pull request ruslo#1513 from olliwang/android

Fix the issue that libxml2 failed to build with NDK r18.

Merge pull request ruslo#1511 from olliwang/android

Fix “—sysroot” for Android Studio.

Merge pull request ruslo#1512 from epvbergen/bugfix.zlib

ZLIB: added zlib.pc to PACKAGE_UNRELOCATABLE_TEXT_FILES for glib et al.

Fix CURL Android (add HAVE_POLL_FINE_EXITCODE__TRYRUN_OUTPUT)

Merge pull request ruslo#1510 from dvirtz/pr.update.type_safe

update type_safe to v0.2-p1

Docs: Fix "path too long" with HUNTER_BINARY_DIR in CI

Bump CLI11 version to 1.6.1, remove single file generation (ruslo#1506)

Merge pull request ruslo#1503 from ithron/pr.PhysUnits

Add 'PhysUnits' package

Add 'USES_TERMINAL_*' to ExternalProject_Add

Merge pull request ruslo#1502 from ithron/pr.Microsoft.GSL

Update Microsoft.GSL to v1.0.0-p1