Allow examples and test-suite to be built out of source tree

- Examples/Makefile.in rules use SRCDIR as the relative source directory

- ./config.status replicates Examples/ source directory tree in build
  directory, and copies each Makefile to build directory, prefixed with
  a header which sets SRCDIR to source directory

- Examples/test-suite/.../Makefile.in set SRCDIR from Autoconf-set srcdir

- Examples/test-suite/errors/Makefile.in needs to filter out source
  directory from SWIG error messages

- Lua: embedded interpreters are passed location of run-time test

- Python: copy run-time scripts to build directory because of 2to3
  conversion; import_packages example copies __init__.py from source
  directory; test-suite sets SCRIPTDIR to location of run-time tests

- Javascript: binding.gyp renamed to binding.gyp.in so that $srcdir
  can be substituted with SRCDIR; removed './' from require() statements
  so that NODE_PATH can be used to point Node.js to build directory

Examples/test-suite/java/Makefile.in

@@ -6,10 +6,17 @@ LANGUAGE     = java
 JAVA         = @JAVA@
 JAVAC        = @JAVAC@
 JAVAFLAGS    = -Xcheck:jni
+SCRIPTDIR    = $(srcdir)
 SCRIPTSUFFIX = _runme.java
+
 srcdir       = @srcdir@
 top_srcdir   = ../@top_srcdir@
 top_builddir = ../@top_builddir@
+ifeq (.,$(srcdir))
+SRCDIR = ../
+else
+SRCDIR = ../$(srcdir)/
+endif
 
 C_TEST_CASES = \
 	java_lib_arrays \
@@ -72,7 +79,7 @@ director_nspace_director_name_collision.%: JAVA_PACKAGE = $*Package
 
 # Makes a directory for the testcase if it does not exist
 setup = \
-	if [ -f $(srcdir)/$(SCRIPTPREFIX)$*$(SCRIPTSUFFIX) ]; then	  \
+	if [ -f $(SCRIPTDIR)/$(SCRIPTPREFIX)$*$(SCRIPTSUFFIX) ]; then	  \
 	  echo "$(ACTION)ing $(LANGUAGE) testcase $* (with run test)" ; \
 	else								  \
 	  echo "$(ACTION)ing $(LANGUAGE) testcase $*" ;			  \
@@ -86,8 +93,8 @@ setup = \
 # Note Java uses LD_LIBRARY_PATH under Unix, PATH under Cygwin/Windows, SHLIB_PATH on HPUX and DYLD_LIBRARY_PATH on Mac OS X.
 run_testcase = \
 	cd $(JAVA_PACKAGE) && $(COMPILETOOL) $(JAVAC) -classpath . `find . -name "*.java"` && cd .. && \
-	if [ -f $(srcdir)/$(SCRIPTPREFIX)$*$(SCRIPTSUFFIX) ]; then \
-	  $(COMPILETOOL) $(JAVAC) -classpath . -d . $(srcdir)/$(SCRIPTPREFIX)$*$(SCRIPTSUFFIX) && \
+	if [ -f $(SCRIPTDIR)/$(SCRIPTPREFIX)$*$(SCRIPTSUFFIX) ]; then \
+	  $(COMPILETOOL) $(JAVAC) -classpath . -d . $(SCRIPTDIR)/$(SCRIPTPREFIX)$*$(SCRIPTSUFFIX) && \
 	  env LD_LIBRARY_PATH="$(JAVA_PACKAGE):$$LD_LIBRARY_PATH" PATH="$(JAVA_PACKAGE):$$PATH" SHLIB_PATH="$(JAVA_PACKAGE):$$SHLIB_PATH" DYLD_LIBRARY_PATH="$(JAVA_PACKAGE):$$DYLD_LIBRARY_PATH" $(RUNTOOL) $(JAVA) $(JAVAFLAGS) -classpath . $*_runme; \
 	fi