Revert "device transfer: replace picky with boring"

We need to work out more kinks cross-compiling boring-sys, so revert
this for now. (But keep the fix to use the correct Android NDK.)

.github/workflows/build_and_test.yml

@@ -86,7 +86,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - run: sudo apt-get update && sudo apt-get install gcc-multilib g++-multilib
+    - run: sudo apt-get update && sudo apt-get install gcc-multilib
 
     - name: Install Rust
       run: rustup +stable target add i686-unknown-linux-gnu
@@ -127,7 +127,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - run: sudo apt-get update && sudo apt-get install gcc-multilib g++-multilib
+    - run: sudo apt-get update && sudo apt-get install gcc-multilib
 
     - name: Install Rust
       uses: actions-rs/toolchain@v1
@@ -154,8 +154,10 @@ jobs:
       run: cargo test --all --verbose -- -Z unstable-options --include-ignored
 
     - name: Run tests (32-bit)
+      # Exclude device-transfer because OpenSSL, used for reference results,
+      # doesn't support the --target option.
       # Exclude signal-neon-futures because those tests run Node
-      run: cargo test --all --verbose --target i686-unknown-linux-gnu --exclude signal-neon-futures -- -Z unstable-options --include-ignored
+      run: cargo test --all --verbose --target i686-unknown-linux-gnu --exclude device-transfer --exclude signal-neon-futures -- -Z unstable-options --include-ignored
 
     - name: Build benches
       run: cargo build --benches --verbose
@@ -178,9 +180,6 @@ jobs:
     - name: Install NDK
       run: sudo ${ANDROID_HOME}/tools/bin/sdkmanager --install "ndk;${NDK_VERSION}"
 
-    - name: Install boring cross-compile dependencies
-      run: sudo apt-get update && sudo apt-get install gcc-multilib
-
     - name: Install Rust
       uses: actions-rs/toolchain@v1
       with:
@@ -231,12 +230,6 @@ jobs:
       shell: bash
       run: echo "::set-output name=node-version::$(cat .nvmrc)"
 
-    # install nasm compiler for boring
-    - name: Install nasm
-      if: startsWith(matrix.os, 'windows')
-      run: choco install nasm
-      shell: cmd
-
     - uses: actions/setup-node@v2
       with:
         node-version: ${{ steps.get-nvm-version.outputs.node-version }}
@@ -325,3 +318,4 @@ jobs:
         run: pod lib lint --verbose --platforms=ios --include-podspecs=SignalCoreKit/SignalCoreKit.podspec --skip-import-validation
         env:
           XCODE_XCCONFIG_FILE: swift/PodLibLint.xcconfig
+