Cherry-pick from #5298.

kmconvert built-in help was missing `-targets`, and the parameter
checking was skipping the last parameter (which only mattered if the
last parameter was `-nologo`, but still...).

fix(common/core/web): optimizes transform construction 🍒

fix(oem/fv/ios): app encryption flag for app store uploads (14.0)

feat(android): Automatically install keyboard through Play Store 🍒

fix(web): Always pass kill_browserstack 🍒 

fix(linux): Exclude s390x from package builds for ibus-keyman 🍒

Resolves #5219.

Uses the Google Play Install Referrer API to automatically discover the
keyboard to install together with Keyman; this keyboard is passed in a
`referrer` parameter to the Play Store page for the Keyman app from the
Keyman website.

auto: increment stable-14.0 version to 14.0.276

Merge pull request #5218 from keymanapp/fix/developer/cherry-pick/5216-space-in-regression-test-file

fix(developer): support spaces in regression tests 🍒

ibus-keyman depends on keyman-keyboardprocessor which we don't
build for s390x because we currently don't support big-endian.
We only build for the same architectures as keyman-keyboardprocessor.

(cherry picked from commit f0e2c848)

Fixes #5216.

A `<text>` element in the regression text xml which contained only
whitespace would cause the import to crash as this would be ignored by
the XML parser, leading to a `Null` `nodeValue` for that element. To
solve this, we need to:

1. Use `xml:space="preserve"` attribute on `<text>` elements
2. Update the DTD to allow `xml:space` on `<text>` elements
3. While we are at it, move the DTD from `www.tavultesoft.com` to
   `api.keyman.com`.

See also:
* keymanapp/tavultesoft.com#4
* keymanapp/api.keyman.com#155

chore(ios): renames problematic app selectors 🍒

feat(web): Add script to deploy KeymanWeb release to s.keyman.com 🍒 

fix(common/core/desktop): Fix failing tests on armhf 🍒

Matches work completed in #5169 for Keyman Core, kmx_file.cpp.

While this code will hopefully disappear in 15.0, it's good to make sure
we aren't diverging beforehand.

Also tidies up a couple of other cases in `CopyKeyboard` in Keyman Core.

(cherry picked from commit c9897bb3)

This change fixes the FixupKeyboard method. In the .kmx files on
disk array pointers for an empty array point to the end of the file
(one byte after the end of the data structure). When we expand the
pointers in FixupKeyboard this leads to `cgp->dpKeyArray` to point to an
unallocated memory location - this shouldn't matter since we don't
try to read or write at this location if the Key array is empty,
but armhf still seems to raise a SIGBUS, probably because we cast
the value to a `LPKEY`. This change sets `cgp->dpKeyArray` to `NULL`
if we have an empty key array, similar to what's done for the strings.

Closes #5072.

(cherry picked from commit 68706c94)

(cherry picked from commit 7c78fb0a)

s390x is big-endian which we currently don't support (#5111).

Only build on architectures supported by Debian. This excludes the
following little-endian architectures:
alpha arm ia64 riscv64 sh4 x32 arm64ilp32 mipsn32el
and the following big-endian ones:
avr32 hppa m68k mips mips64 mipsn32 powerpc ppc64 s390 sparc sparc64

See https://wiki.debian.org/SupportedArchitectures
and https://wiki.debian.org/ArchitectureSpecificsMemo

(cherry picked from commit 9c2d3094)

fix(android/samples): Set gradlew executable for Tests 🍒 

fix(windows): avoid cached hotkey state 🍒

chore(android): Add -clean flag to build script 🍒 

fix(ios): artifact upload preparation 🍒

chore(web): Add CI script to kill BrowserStack tunnel 🍒 

chore(ios): artifact prep script now in-repo