ci: patch meterpreter.php in installed gem using patch file

Apply php-meterpreter-tcp-eof.patch to the installed metasploit-payloads
gem's meterpreter.php to test the TCP EOF fix without publishing a new gem.

Author: adfoster-r7

.github/patches/php-meterpreter-tcp-eof.patch

@@ -0,0 +1,21 @@
+diff --git a/php/meterpreter/meterpreter.php b/php/meterpreter/meterpreter.php
+--- a/php/meterpreter/meterpreter.php
++++ b/php/meterpreter/meterpreter.php
+@@ -1972,6 +1972,17 @@ function read($resource, $len=null) {
+       } else {
+         $tmp = fread($resource, $len);
+         $last_requested_len = $len;
++        # An empty fread on a stream that stream_select reported as readable
++        # means the peer has closed the connection (EOF). feof() may not return
++        # true immediately on all stream types (e.g. SSL), so treat "" as EOF
++        # for non-C2 channel sockets.
++        if ($tmp === false || ($tmp === '' && $resource !== $msgsock)) {
++          if (empty($buff)) {
++            my_print("----  EOF ON " . get_resource_map_id($resource) . "  ----");
++            $buff = false;
++          }
++          break;
++        }
+         $buff .= $tmp;
+         if (strlen($tmp) < $len) {
+           break;

.github/workflows/shared_meterpreter_acceptance.yml

@@ -348,17 +348,15 @@ jobs:
         shell: bash
         run: |
           GEM_PATH=$(bundle show metasploit-payloads)
-          curl -fsSL "https://raw.githubusercontent.com/rapid7/metasploit-payloads/6.5.0-prerelease-build/php/meterpreter/meterpreter.php" \
-            -o "${GEM_PATH}/data/meterpreter/meterpreter.php"
+          patch "${GEM_PATH}/data/meterpreter/meterpreter.php" .github/patches/php-meterpreter-tcp-eof.patch
         working-directory: metasploit-framework
 
       - name: Patch meterpreter.php in installed gem (Windows)
         if: ${{ matrix.meterpreter.name == 'php' && runner.os == 'Windows' }}
         shell: pwsh
         run: |
           $gemPath = bundle show metasploit-payloads
-          Invoke-WebRequest -Uri "https://raw.githubusercontent.com/rapid7/metasploit-payloads/6.5.0-prerelease-build/php/meterpreter/meterpreter.php" `
-            -OutFile "$gemPath\data\meterpreter\meterpreter.php"
+          patch "$gemPath\data\meterpreter\meterpreter.php" .github\patches\php-meterpreter-tcp-eof.patch
         working-directory: metasploit-framework
 
       - name: Acceptance