Add __NR_bpf constant for i686.

This adds support for running the net tests on 32-bit x86.

Bug: 79532682
Bug: 117749037

Test: run vts -m VtsKernelNetTest
Test result after change: PASSED: 2, FAILED: 0, MODULES: 2 of 2


Signed-off-by: Alistair Strachan <astrachan@google.com>
Change-Id: I5a8ade3a2292734001dd6e85f9c6b5cefc8de9c1
Merged-in: I5a8ade3a2292734001dd6e85f9c6b5cefc8de9c1
(cherry picked from commit 7993a85525c0ce459f424a2152ea24b972c6acdc)
diff --git a/net/test/bpf.py b/net/test/bpf.py
index 5e90daa..9dc3c46 100755
--- a/net/test/bpf.py
+++ b/net/test/bpf.py
@@ -28,7 +28,9 @@
     "aarch64": 280,
     "armv7l": 386,
     "armv8l": 386,
-    "x86_64": 321}[os.uname()[4]]
+    "i686" : 357,
+    "x86_64": 321,
+}[os.uname()[4]]
 
 LOG_LEVEL = 1
 LOG_SIZE = 65536