Added tcpdump x86_64 workflow

.github/workflows/build-tcpdump-x86_64.yml

@@ -0,0 +1,39 @@
+name: tcpdump x86_64
+on:
+  workflow_dispatch
+jobs:
+    build:
+        name: Build tcpdump x86_64
+        runs-on: ubuntu-latest
+        container: muslcc/x86_64:x86_64-linux-musl
+        steps:
+
+          - name: Build tcpdump
+            run: |
+              cd
+              apk update && apk add flex bison wget make
+              wget https://www.tcpdump.org/release/libpcap-1.9.1.tar.gz
+              tar xzf libpcap-1.9.1.tar.gz
+              cd libpcap-1.9.1/
+              ./configure --with-pcap=linux
+              make -j2
+              export LIBPCAP_PATH=$(pwd)
+              cd
+              wget https://www.tcpdump.org/release/tcpdump-4.9.3.tar.gz
+              tar xzf tcpdump-4.9.3.tar.gz
+              cd tcpdump-4.9.3/
+              export CFLAGS="-static -I${LIBPCAP_PATH} -L${LIBPCAP_PATH}"
+              export CPPFLAGS=-static
+              export LDFLAGS=-static
+              ./configure
+              make -j2
+              pwd
+
+          - name: List build dir
+            run: ls -la
+
+          - name: Upload artifacts
+            uses: actions/upload-artifact@v2
+            with:
+                name: tcpdump-4.9.3
+                path: /github/home/tcpdump-4.9.3/tcpdump