usbutils: Patch to detect iconv support

usbutils: Patch to detect iconv support

Fixes build failures on uclibc

| lsusb-usbmisc.o: In function `usb_string_to_native':
|
/home/kraj/work/angstrom-repo/build/tmp-angstrom_next-uclibc/work/armv7at2hf-vfp-neon-angstrom-linux-uclibceabi/usbutils/007-r0/usbutils-007/usbmisc.c:190:
undefined reference to `libiconv_open'
|
/home/kraj/work/angstrom-repo/build/tmp-angstrom_next-uclibc/work/armv7at2hf-vfp-neon-angstrom-linux-uclibceabi/usbutils/007-r0/usbutils-007/usbmisc.c:199:
undefined reference to `libiconv'
|
/home/kraj/work/angstrom-repo/build/tmp-angstrom_next-uclibc/work/armv7at2hf-vfp-neon-angstrom-linux-uclibceabi/usbutils/007-r0/usbutils-007/usbmisc.c:202:
undefined reference to `libiconv_close'
| collect2: error: ld returned 1 exit status
| make[2]: *** [lsusb] Error 1

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>