Move appveyor off the system drive

.appveyor.yml

@@ -9,6 +9,8 @@ cache:
   - '%USERPROFILE%\.cargo'
   - '%APPVEYOR_BUILD_FOLDER%\target'
 
+clone_folder: d:\projects\solana
+
 build_script:
   - bash ci/publish-tarball.sh
 

ci/publish-tarball.sh

@@ -9,8 +9,9 @@ if [[ -n $APPVEYOR ]]; then
   source ci/rust-version.sh
 
   appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  export USERPROFILE="D:\\"
   ./rustup-init -yv --default-toolchain $rust_stable --default-host x86_64-pc-windows-msvc
-  export PATH="$PATH:$USERPROFILE/.cargo/bin"
+  export PATH="$PATH:/d/.cargo/bin"
   rustc -vV
   cargo -vV
 fi