Try some more linker magic to get it working on ubuntu 20 (#11784)

Release Notes:

- N/A

script/bundle-linux

@@ -38,7 +38,7 @@ host_line=$(echo "$version_info" | grep host)
 target_triple=${host_line#*: }
 
 # Build binary in release mode
-export RUSTFLAGS="-C link-args=-Wl,-rpath,\$ORIGIN/../lib"
+export RUSTFLAGS="-C link-args=-Wl,--disable-new-dtags,-rpath,\$ORIGIN/../lib"
 cargo build --release --target "${target_triple}" --package zed --package cli
 
 # Strip the binary of all debug symbols
@@ -65,7 +65,7 @@ cp "target/${target_triple}/release/cli" "${zed_dir}/bin/cli"
 find_libs() {
     ldd target/${target_triple}/release/Zed |\
     cut -d' ' -f3 |\
-    grep -v '\<\(libstdc++.so\|libc.so\|libgcc_s.so\|libm.so\)'
+    grep -v '\<\(libstdc++.so\|libc.so\|libgcc_s.so\|libm.so\|libpthread.so\)'
 }
 
 mkdir -p "${zed_dir}/lib"