add BPF GCC support for BPF CI #63

Job	Run time
x86_64-gcc / build-release	0s
x86_64-llvm-17 / build-release	0s
x86_64-gcc / build / build for x86_64 with gcc	22m 40s
x86_64-llvm-17 / build / build for x86_64 with llvm-17	28m 51s
x86_64-gcc / test (test_progs, false, 360) / test_progs on x86_64 with gcc	6m 50s
x86_64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with gcc	6m 54s
x86_64-gcc / test (test_maps, false, 360) / test_maps on x86_64 with gcc	4m 2s
x86_64-gcc / test (test_verifier, false, 360) / test_verifier on x86_64 with gcc	48s
x86_64-llvm-17 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-17	4m 1s
x86_64-llvm-17 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-17	39s
x86_64-llvm-17 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-17	6m 46s
x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17	6m 59s
	1h 28m 30s

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