Mark additional helper function as inline

Signed-off-by: Brenden Blanco <bblanco@gmail.com>

src/cc/export/helpers.h

@@ -147,7 +147,7 @@ static u32 (*bpf_get_prandom_u32)(void) =
 static int (*bpf_trace_printk_)(const char *fmt, u64 fmt_size, ...) =
   (void *) BPF_FUNC_trace_printk;
 int bpf_trace_printk(const char *fmt, ...) asm("llvm.bpf.extra");
-static void bpf_tail_call_(u64 map_fd, void *ctx, int index) {
+static inline void bpf_tail_call_(u64 map_fd, void *ctx, int index) {
   ((void (*)(void *, u64, int))BPF_FUNC_tail_call)(ctx, map_fd, index);
 }
 static int (*bpf_clone_redirect)(void *ctx, int ifindex, u32 flags) =