update of jbigi scripts

- merge mbuild_jbigi.sh into build_jbigi.sh and drop mbuild_jbigi.sh
- make build.sh's tests optional
- try to determine the locations of JAVA_HOME and I2P

debian/patches/0002-jbigi-soname.patch

@@ -2,18 +2,18 @@ From: Kill Your TV <killyourtv@i2pmail.org>
 Date: Wed, 11 May 2011 00:12:04 +0000
 Subject: jbigi soname
 
-The purpose of this patch is to change the path that mbuild_jbigi.sh
+The purpose of this patch is to change the path that build_jbigi.sh
 expects to find the source files at. At the same time I'm specifying
 a soname to shut lintian up.
 
 ---
- core/c/jbigi/mbuild_jbigi.sh |    6 +++---
- 1 files changed, 3 insertions(+), 3 deletions(-)
+ core/c/jbigi/build_jbigi.sh |    4 +++---
+ 1 files changed, 2 insertions(+), 2 deletions(-)
 
---- a/core/c/jbigi/mbuild_jbigi.sh
-+++ b/core/c/jbigi/mbuild_jbigi.sh
-@@ -47,7 +47,7 @@
-                 fi
+--- a/core/c/jbigi/build_jbigi.sh
++++ b/core/c/jbigi/build_jbigi.sh
+@@ -37,7 +37,7 @@
+             UNIXTYPE="solaris"
          fi
          COMPILEFLAGS="-fPIC -Wall"
 -        INCLUDES="-I. -I../../jbigi/include -I$JAVA_HOME/include -I$JAVA_HOME/include/${UNIXTYPE}"
@@ -21,7 +21,7 @@ a soname to shut lintian up.
          LINKFLAGS="-shared -Wl,-soname,libjbigi.so"
          LIBFILE="libjbigi.so";;
  *)
-@@ -66,7 +66,7 @@
+@@ -56,7 +56,7 @@
  
  echo "Compiling C code..."
  rm -f jbigi.o $LIBFILE