package/webrtc-audio-processing: needs host-pkgconf

configure fails if the pkgconfig.m4 macros are not available during
this package autoreconf:

./configure: line 11829: syntax error near unexpected token `GNUSTL,'
./configure: line 11829: `  PKG_CHECK_MODULES(GNUSTL, gnustl)'

Fixes:
 - http://autobuild.buildroot.org/results/9cbdfb76ea38864fce1acca88714c48c41c77255

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
1 file changed