hosted/meson: Make sure that the dependencies not being found/buildab…

…le is non-fatal for BMDA+firmware builds and instead disables BMDA in that case

src/platforms/hosted/meson.build

@@ -118,7 +118,9 @@ libusb = dependency(
  'install_targets=false',
  'docs=disabled',
  'build_native=true',
- ]
+ ],
+ required: not is_cross_build,
+ disabler: true,
 )
 
 if build_machine.system() in ['windows', 'cygwin']
@@ -153,7 +155,9 @@ else
  'ftdi_eeprom=disabled',
  #'python_bindings=disabled',
  'build_native=true',
- ]
+ ],
+ required: not is_cross_build,
+ disabler: true,
  )
  bmda_sources += files('serial_unix.c')
 endif
@@ -170,7 +174,9 @@ if build_machine.system() == 'linux'
  'install_targets=false',
  'with_libusb=false',
  'build_native=true',
- ]
+ ],
+ required: not is_cross_build,
+ disabler: true,
  )
 else
  hidapi = dependency(
@@ -182,7 +188,9 @@ else
  'default_library=static',
  'install_targets=false',
  'build_native=true',
- ]
+ ],
+ required: not is_cross_build,
+ disabler: true,
  )
 endif