Build examples in release mode so they'll fit in the f107's flash

Author: Johannes Draaijer

.github/workflows/build.yml

@@ -137,35 +137,35 @@ jobs:
         with:
           use-cross: false
           command: build
-          args: --target=${{ matrix.target }} --example pktgen --features stm32f429
+          args: --release --target=${{ matrix.target }} --example pktgen --features stm32f429
 
       - name: cargo build f4 example ip
         uses: actions-rs/cargo@v1
         with:
           use-cross: false
           command: build
-          args: --target=${{ matrix.target }} --example ip --features stm32f429,smoltcp-phy,log,smoltcp/socket-tcp,smoltcp/socket-icmp,smoltcp/log,smoltcp/verbose
+          args: --release --target=${{ matrix.target }} --example ip --features stm32f429,smoltcp-phy,log,smoltcp/socket-tcp,smoltcp/socket-icmp,smoltcp/log,smoltcp/verbose
 
       - name: cargo build f4 example arp
         uses: actions-rs/cargo@v1
         with:
           use-cross: false
           command: build
-          args: --target=${{ matrix.target }} --example arp --features stm32f407
+          args: --release --target=${{ matrix.target }} --example arp --features stm32f407
 
       - name: cargo build f4 example arp-smoltcp
         uses: actions-rs/cargo@v1
         with:
           use-cross: false
           command: build
-          args: --target=${{ matrix.target }} --example arp-smoltcp --features stm32f407,smoltcp-phy,smoltcp/socket-icmp
+          args: --release --target=${{ matrix.target }} --example arp-smoltcp --features stm32f407,smoltcp-phy,smoltcp/socket-icmp
 
       - name: cargo build f1 example ip
         uses: actions-rs/cargo@v1
         with:
           use-cross: false
           command: build
-          args: --target=${{ matrix.target }} --example ip-f107 --features stm32f107,smoltcp-phy,log,smoltcp/socket-tcp,smoltcp/socket-icmp,smoltcp/log,smoltcp/verbose
+          args: --release --target=${{ matrix.target }} --example ip-f107 --features stm32f107,smoltcp-phy,log,smoltcp/socket-tcp,smoltcp/socket-icmp,smoltcp/log,smoltcp/verbose
 
   rtic-echo-example:
     name: rtic-echo example