crossfiles: Streamline and simplify crossfiles

* `needs_exe_wrapper` is only needed in specific cases when
  `exe_wrapper` is not set.
  See https://mesonbuild.com/Cross-compilation.html#properties

* "Before 0.56.0, <lang>_args and <lang>_link_args must be put in the
   properties section instead, else they will be ignored."
   [https://mesonbuild.com/Machine-files.html#meson-builtin-options]
   Our minimum version is 0.49.0. Meson >= 0.56.0 prints a deprecation
   warning.

package/crossfiles/aarch64-android.meson

@@ -11,5 +11,5 @@ needs_exe_wrapper = true
 [host_machine]
 system = 'android'
 cpu_family = 'aarch64'
-endian = 'little'
 cpu = 'aarch64'
+endian = 'little'

package/crossfiles/arm-android.meson

@@ -11,5 +11,5 @@ needs_exe_wrapper = true
 [host_machine]
 system = 'android'
 cpu_family = 'arm'
-endian = 'little'
 cpu = 'arm'
+endian = 'little'

package/crossfiles/i686-w64-mingw32.meson

@@ -4,11 +4,10 @@ cpp = 'i686-w64-mingw32-g++'
 ar = 'i686-w64-mingw32-ar'
 strip = 'i686-w64-mingw32-strip'
 windres = 'i686-w64-mingw32-windres'
-exe_wrapper = ['wine']
+exe_wrapper = 'wine'
 
 [properties]
 c_link_args = ['-static-libgcc']
-needs_exe_wrapper = true
 
 [host_machine]
 system = 'windows'

package/crossfiles/wasm32.meson

@@ -3,14 +3,10 @@ c = 'emcc'
 cpp = 'em++'
 ar = 'emar'
 strip = 'emstrip'
-exe_wrapper = ['node']
-
-[built-in options]
-c_link_args = ['-sEXPORT_ALL=1']
-cpp_link_args = ['-sEXPORT_ALL=1']
+exe_wrapper = 'node'
 
 [properties]
-needs_exe_wrapper = true
+c_link_args = ['-sEXPORT_ALL=1']
 
 [host_machine]
 system = 'emscripten'

package/crossfiles/wasm64.meson

@@ -3,14 +3,10 @@ c = 'emcc'
 cpp = 'em++'
 ar = 'emar'
 strip = 'emstrip'
-exe_wrapper = ['node']
-
-[built-in options]
-c_link_args = ['-sEXPORT_ALL=1']
-cpp_link_args = ['-sEXPORT_ALL=1']
+exe_wrapper = 'node'
 
 [properties]
-needs_exe_wrapper = true
+c_link_args = ['-sEXPORT_ALL=1']
 
 [host_machine]
 system = 'emscripten'

package/crossfiles/x86_64-w64-mingw32.meson

@@ -4,11 +4,10 @@ cpp = 'x86_64-w64-mingw32-g++'
 ar = 'x86_64-w64-mingw32-ar'
 strip = 'x86_64-w64-mingw32-strip'
 windres = 'x86_64-w64-mingw32-windres'
-exe_wrapper = ['wine']
+exe_wrapper = 'wine'
 
 [properties]
 c_link_args = ['-static-libgcc']
-needs_exe_wrapper = true
 
 [host_machine]
 system = 'windows'