src/ebpf.rs: Increase instruction limit to 1 million

The linux kernel allows programs of 1 million instructions, see

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c04c0d2b968ac45d6ef020316808ef6c82325a82

I'm hitting the 4096 limit in some corner cases with
https://github.com/seanyoung/cir, if the infrared protocol is very
complex (e.g. XMP). rbpf is used for testing the generated IR decoders
in the test framework.

Signed-off-by: Sean Young <[email protected]>

src/ebpf.rs

@@ -17,7 +17,7 @@
 use byteorder::{ByteOrder, LittleEndian};
 
 /// Maximum number of instructions in an eBPF program.
-pub const PROG_MAX_INSNS: usize = 4096;
+pub const PROG_MAX_INSNS: usize = 1000000;
 /// Size of an eBPF instructions, in bytes.
 pub const INSN_SIZE: usize = 8;
 /// Maximum size of an eBPF program, in bytes.