Cross compiling improvements + macOS universal binary (#1458)

* chore(resources): rename macos_arm64.txt to macos-arm64.txt
   This matches the platform-arch convention like many other parts of the project.
* chore(resources/cross): rename wasm.txt to unknown-wasm32.txt
* refactor(scripts/common.sh): use parameter expansion instead of if else
* feat(scripts/common.sh): support custom arch and platform for get_default_build_dir
* feat(scripts/build.sh): add --cross-platform, --cross-arch and --cross-file
* feat(scripts/package.sh): add --cross-platform and --cross-arch
* feat(build-packages.sh): add support for new options in build.sh and packages.sh
* ci(build): make arm64 binaries in CI
* ci(build): do not install external libraries
* ci(build): fix invalid artifact name
* ci(build): fix INSTALL_NAME
* ci(build): change name for macos artifacts
* ci(build): add script to build universal dmgs from individual dmgs
* ci(build): build universal dmgs
* fix(make-universal-binaries): fix wrong path for hdiutil
* ci(build): rename macos action
* fix(make-universal-binaries.sh): fix wrong pathname for ditto
* ci(release): build macos universal binaries
* ci(release): remove useless variables
* ci(release): fix wrong dependency
* ci(build): fix old ubuntu version
   This version will be restored once I complete some container-specific fixes.
* ci(build): make build_macos_universal depend on release
* ci(build): fix wrong dmg dir
* style(ci): capitalize 'universal' for CI name
* fix(make-universal-binaries.sh): fix truncated dmg name when it contains dots
* ci: styling changes
* ci(release): install appdmg only

resources/cross/unknown-wasm32.txt

@@ -0,0 +1,46 @@
+# cross file for WASM.
+# use this file by running meson setup --cross-file resources/cross/wasm.txt <builddir>
+
+[constants]
+
+# a list of functions that can run without being asyncified; proceed with caution
+asyncify_ignores = '["SDL_BlitScaled","SDL_UpperBlitScaled","SDL_MapRGB*","SDL_FillRect","SDL_FreeSurface","SDL_CreateRGBSurface","SDL_GetWindowSurface","SDL_PollEvent","SDL_CreateSystemCursor","SDL_SetWindowTitle","SDL_SetCursor","SDL_GetWindowSize","SDL_GetWindowPosition","lua_push*","lua_rawget*","luaL_check*","pcre2*","FT_*","Bezier_*","g_*","FT_*","ft_*","TT_*","tt_*","__*","*printf","gray_*","fopen","fclose","fread","fflush","qsort","sift"]'
+
+# enable advising for optimizing the list above; disable this to prevent flooding logs
+asyncify_advise = '0'
+
+# initial heap size in bytes; make sure it is not too low (around 64mb - 250mb)
+initial_heap = '104857600'
+
+
+[binaries]
+c = 'emcc'
+cpp = 'em++'
+ar = 'emar'
+strip = 'emstrip'
+cmake = ['emmake', 'cmake']
+pkg-config = ['emconfigure', 'pkg-config']
+sdl2-config = ['emconfigure', 'sdl2-config']
+
+
+[properties]
+needs_exe_wrapper = true
+
+
+[built-in options]
+c_args = []
+c_link_args = []
+cpp_args = []
+cpp_link_args = []
+
+
+[project options]
+buildtype = 'release'
+c_link_args = ['-s', 'ALLOW_MEMORY_GROWTH=1', '-s', 'INITIAL_MEMORY=' + initial_heap, '-s', 'ASYNCIFY=1', '-s', 'ASYNCIFY_ADVISE=' + asyncify_advise, '-s', 'ASYNCIFY_STACK_SIZE=6144', '-s', 'ASYNCIFY_REMOVE=' + asyncify_ignores, '-s', 'FORCE_FILESYSTEM=1']
+
+	
+[host_machine]
+system = 'emscripten'
+cpu_family = 'wasm32'
+cpu = 'wasm32'
+endian = 'little'