libwiringpi-dev/depends: Add pkg-config.

Signed-off-by: steve.jeong <jkhpro1003@gmail.com>
Change-Id: I2809439436adf2223617a8e50cced0ada227cea5
diff --git a/debian/control b/debian/control
index 62655f2..a2bf543 100644
--- a/debian/control
+++ b/debian/control
@@ -34,7 +34,8 @@
   libc6-dev,
 # libgpiod-dev,
   libwiringpi2 (= ${binary:Version}),
-  odroid-wiringpi (= ${binary:Version})
+  odroid-wiringpi (= ${binary:Version}),
+  pkg-config
 Description: GPIO development library for ODROID
   Development libraries to allow GPIO access on a ODROID from C
   and C++ programs.