package/wpa_supplicant: fix static build with openssl and atomic

Use pkg-config to find openssl dependencies such as lz or latomic

Fix build on sparc v8 (even if there is no autobuilder failures yet)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/wpa_supplicant/wpa_supplicant.mk

@@ -105,8 +105,8 @@ endif
 
 # Try to use openssl if it's already available
 ifeq ($(BR2_PACKAGE_LIBOPENSSL),y)
-WPA_SUPPLICANT_DEPENDENCIES += libopenssl
-WPA_SUPPLICANT_LIBS += $(if $(BR2_STATIC_LIBS),-lcrypto -lz)
+WPA_SUPPLICANT_DEPENDENCIES += host-pkgconf libopenssl
+WPA_SUPPLICANT_LIBS += `$(PKG_CONFIG_HOST_BINARY) --libs openssl`
 WPA_SUPPLICANT_CONFIG_EDITS += 's/\#\(CONFIG_TLS=openssl\)/\1/'
 else
 WPA_SUPPLICANT_CONFIG_DISABLE += CONFIG_EAP_PWD