thunderbird: add firefox patch for newer clang

srcpkgs/thunderbird/patches/clang-sysroot-toolchain-fix.patch

@@ -0,0 +1,18 @@
+We need to pass --sysroot and --gcc-toolchain explicitly for cross compiling with glibc
+because when the lld tries to link libc, it will read the gcc libc linker script which
+includes absolute paths to actual libc files and without the sysroot argument it picks
+the host ones, even though it discovered the linker script in the sysroot already.
+linker-script = /usr/aarch64-linux-gnu/lib64/libc.so
+--- a/build/moz.configure/toolchain.configure
++++ b/build/moz.configure/toolchain.configure
+@@ -725,6 +725,10 @@
+             flags.append("--target=%s" % toolchain)
+             has_target = True
+ 
++    if info.type == "clang" and not target.os == "WASI" and (info.cpu != target.cpu):
++        flags.append("--sysroot=/usr/%s" % toolchain)
++        flags.append("--gcc-toolchain=/usr")
++
+     if not has_target and (not info.cpu or info.cpu != target.cpu):
+         same_arch = same_arch_different_bits()
+         if (target.cpu, info.cpu) in same_arch:

srcpkgs/thunderbird/template

@@ -17,7 +17,7 @@ lib32disabled=yes
 
 hostmakedepends="autoconf unzip zip pkg-config perl python3 yasm rust cargo
  llvm clang nodejs cbindgen nasm which tar"
-makedepends="nss-devel libjpeg-turbo-devel gtk+3-devel icu-devel
+makedepends="nss-devel libjpeg-turbo-devel gtk+3-devel libicu77-devel
  pixman-devel libevent-devel libnotify-devel libvpx-devel
  libXrender-devel libXcomposite-devel libSM-devel libXt-devel rust-std
  libXdamage-devel freetype-devel $(vopt_if alsa alsa-lib-devel)