Add patches provided upstream [1] by Fabio Berton to fix error:

> ./gencode.c: In function 'pcap_compile':
> ./gencode.c:693:8: error: 'compiler_state_t {aka struct _compiler_state}' has no member named 'ai'
>   cstate.ai = NULL;
>         ^
> ./gencode.c: In function 'gen_gateway':
> ./gencode.c:4914:13: error: 'cstate' undeclared (first use in this function)
>    bpf_error(cstate, "direction applied to 'gateway'");
>              ^

[1] https://github.com/the-tcpdump-group/libpcap/pull/541

Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Tested-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>

Update libpcap to upstream release 1.8.1
Change the name from libpcap.so.1.3 to libpcap.so.1
Remove parts of patch 201 which moved code among src files.
Import patch 204 from Debian to update the USB path.

Signed-off-by: Paul Wassi <p.wassi@gmx.at>
Signed-off-by: Felix Fietkau <nbd@nbd.name> [fix parallel build bug]

There seems to be a situation in which a rebuild of libpcap.so is triggered
in the install step of the libpcap Makefile. libpcap.so is the wrong
target, leading to the build failure reported in [1].

Fix the dependency of install-shared-so to $(SHAREDLIB) so the build can
succeed in this case.

[1] https://dev.openwrt.org/ticket/19894

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 46776

-size_of(old libpcap-1.3.0) = 85228 Byte
-size_of(new libpcap-1.5.3) = 88587 Byte
=> ~3.3 KByte increase

SVN-Revision: 39473

Disabled canusb by setting ac_cv_header_libusb_1_0_libusb_h to no in
Makefile.  Upstream configure script ignores --disable-canusb.

Signed-off-by: Russell Senior <russell@personaltelco.net>

SVN-Revision: 36150

SVN-Revision: 33657