MT#6219 fix java build process

debian/control

@@ -8,12 +8,12 @@ Build-Depends: bison,
                docbook-xml,
                dpkg-dev (>= 1.16.1.1),
                flex,
-               gcj-jdk,
                libconfuse-dev,
                libcurl4-gnutls-dev,
                libdb-dev (>= 4.6.19),
                libevent-dev,
                libexpat1-dev,
+               libgcj12-dev,
                libgeoip-dev (>= 1.4.5),
                libhiredis-dev (>= 0.10.0),
                libjson0-dev,

debian/rules

@@ -20,6 +20,9 @@ include /usr/share/dpkg/buildflags.mk
 # Uncomment this to turn on verbose mode.
 #export DH_VERBOSE=1
 
+# java stuff using libgcj12
+export JAVA_HOME=/usr/lib/jvm/java-gcj-4.6
+
 # modules not in the "main" kamailio package
 EXCLUDED_MODULES=