Accumulative patch from commit 8fd0f0f323a922aa88ec720ee524f7105d3b0f64

Fix D-Bus build without CONFIG_P2P=y
nl80211: Allow AP mode to be started without monitor interface
nl80211: Process association/disassociation events in AP mode
DBus/P2P: Adding decl for PersistentGroupRemoved signal
DBus/P2P: Rectified type of SecondaryDeviceTypes in device property Get
P2P: Only call dev_lost() for devices that have been dev_found()
wpa_cli: Add missing parameter for P2P_GROUP_ADD command
wpa_supplicant: Respect PKG_CONFIG variable if set in the environment
TLS: Add support for tls_disable_time_checks=1 in client mode
hostapd: Clear keys configured when hostapd reloads configuration
Add dbus signal for information about server certification
Move peer certificate wpa_msg() calls to notify.c
wpa_supplicant AP: Disable AP mode on disassoc paths
wpa_s AP mode: Enable HT20 if driver supports it
Allow PMKSA caching to be disabled on Authenticator
FT: Disable PMKSA cache for FT-IEEE8021X
FT: Clear SME ft_used/ft_ies when disconnecting
	8fd0f0f323a922aa88ec720ee524f7105d3b0f64

Change-Id: I6ae333196c36ffa7589662d5269fabfc3b994605
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/wpa_supplicant/dbus/Makefile b/wpa_supplicant/dbus/Makefile
index cfaf58d..a088200 100644
--- a/wpa_supplicant/dbus/Makefile
+++ b/wpa_supplicant/dbus/Makefile
@@ -15,6 +15,7 @@
 CFLAGS = -MMD -O2 -Wall -g
 endif
 
+PKG_CONFIG ?= pkg-config
 CFLAGS += -I../../src -I../../src/utils
 
 
@@ -38,10 +39,10 @@
 CFLAGS += -DCONFIG_CTRL_IFACE_DBUS
 
 ifndef DBUS_LIBS
-DBUS_LIBS := $(shell pkg-config --libs dbus-1)
+DBUS_LIBS := $(shell $(PKG_CONFIG) --libs dbus-1)
 endif
 ifndef DBUS_INCLUDE
-DBUS_INCLUDE := $(shell pkg-config --cflags dbus-1)
+DBUS_INCLUDE := $(shell $(PKG_CONFIG) --cflags dbus-1)
 endif
 ifdef CONFIG_CTRL_IFACE_DBUS_INTRO
 CFLAGS += -DCONFIG_CTRL_IFACE_DBUS_INTRO
@@ -49,7 +50,7 @@
 DBUS_LIBS += $(shell xml2-config --libs)
 endif
 
-dbus_version=$(subst ., ,$(shell pkg-config --modversion dbus-1))
+dbus_version=$(subst ., ,$(shell $(PKG_CONFIG) --modversion dbus-1))
 DBUS_VERSION_MAJOR=$(word 1,$(dbus_version))
 DBUS_VERSION_MINOR=$(word 2,$(dbus_version))
 ifeq ($(DBUS_VERSION_MAJOR),)