package/aircrack-ng: fix static build

Two fixes in one:

  - openssl's libcrypto needs -lz, but because aircrack-ng does not use
    pkg-config, it misses this dependency. The proper fix would be to
    use pkg-config, like is done for pcre with patch
    0001-Makefile-use-pkg-config-to-find-libpcre-it-s-more-cros.patch
    but adding -lz is much easier.

  - sqlite needs -lpthread, so -lpthread must be added _after_ -lsqlite,
    but we currently add it before. So, force -lpthread after -lsqlite
    when we are doing a static build.

Fixes:
    http://autobuild.buildroot.net/results/1ea/1ea877851e9d2aeeaf9d320bef12321ec2925b5b/
    http://autobuild.buildroot.net/results/cdf/cdf0203fc99d5f7e41e508f6d9edb78a0f0ea732/

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/aircrack-ng/aircrack-ng.mk

@@ -14,7 +14,7 @@ AIRCRACK_NG_MAKE_OPTS = unstable=true
 
 # Account for libpthread in static
 AIRCRACK_NG_LDFLAGS = $(TARGET_LDFLAGS) \
-	$(if $(BR2_PREFER_STATIC_LIB),-lpthread)
+	$(if $(BR2_PREFER_STATIC_LIB),-lpthread -lz)
 
 # libnl support has issues when building static
 ifeq ($(BR2_PREFER_STATIC_LIB),y)
@@ -39,9 +39,10 @@ else
 	AIRCRACK_NG_MAKE_OPTS += pcre=false
 endif
 
+# Duplicate -lpthread, because it is also needed by sqlite
 ifeq ($(BR2_PACKAGE_SQLITE),y)
 	AIRCRACK_NG_DEPENDENCIES += sqlite
-	AIRCRACK_NG_MAKE_OPTS += sqlite=true LIBSQL="-lsqlite3"
+	AIRCRACK_NG_MAKE_OPTS += sqlite=true LIBSQL="-lsqlite3 $(if $(BR2_PREFER_STATIC_LIB),-lpthread)"
 else
 	AIRCRACK_NG_MAKE_OPTS += sqlite=false
 endif