lx-music: Add package

[Kiri2002]

tested in extra-x86-64 with electron25-bin

cat electron25-bin-25.9.8-1-x86_64.pkg.tar.zst-namcap.log
electron25-bin W: ELF file ('usr/lib/electron25/chrome-sandbox') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/chrome_crashpad_handler') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/chromedriver') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/electron') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/libEGL.so') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/libGLESv2.so') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/libffmpeg.so') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/libvk_swiftshader.so') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin W: ELF file ('usr/lib/electron25/libvulkan.so.1') lacks GNU_PROPERTY_X86_FEATURE_1_SHSTK.
electron25-bin E: custom is not a valid SPDX license identifier. See https://spdx.org/licenses/ for valid identifiers, or prefix the identifier with 'LicenseRef-', if it is custom.
electron25-bin W: File (usr/lib/electron25/chrome-sandbox) is setuid or setgid.
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/chrome-sandbox')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/chrome_crashpad_handler')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/chrome_crashpad_handler')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/chromedriver')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/chromedriver')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/electron')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/electron')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/libEGL.so')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/libEGL.so')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/libGLESv2.so')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/libGLESv2.so')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/libffmpeg.so')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/libvk_swiftshader.so')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/libvk_swiftshader.so')
electron25-bin W: Unused shared library '/usr/lib/libdl.so.2' by file ('usr/lib/electron25/libvulkan.so.1')
electron25-bin W: Unused shared library '/usr/lib/libpthread.so.0' by file ('usr/lib/electron25/libvulkan.so.1')