Add 'make install' target to build. It's "MRE-friendly". (See http://www.mozilla.org/projects/embedding/MRE.html for details.)

Changes:
* Added EXTRA_COMPONENTS variable to build.  Use it to automagically install files into the components dir.
* Added SYSINSTALL variable.  Use it install files onto the system.
* Move mozilla-config generation from configure to makefiles
* mozilla-config will now generate paths based upon the MRE-based directory layout.
* Generate mozilla script from template

The installation heirarchy currently looks like:
$prefix -> /bin/mozilla
           /bin/mozilla-config
           /include/mozilla-ver/*
           /lib/mozilla-ver  (mozappdir)
                            /components
                            /res
                            /defaults
                            /chrome

There is preliminary build support for MRE dirs as well though the component manager hasn't had MRE support added yet.

$prefix -> /lib/mre/mre-ver  (mredir)
                            /components

Bug #56601 r=leaf

Makefile.in

@@ -290,6 +290,17 @@ ifdef MOZ_ENABLE_XFT
 	$(MAKE) freetype
 	$(MAKE) expat
 endif
+
+install::
+ifndef MOZ_NATIVE_NSPR
+	$(MAKE) -C nsprpub real_install DESTDIR=$(DESTDIR) libdir=$(mozappdir) includedir=$(includedir)/nspr
+	$(RM) -f $(addprefix $(DESTDIR)$(mozappdir)/$(LIB_PREFIX), $(addsuffix .$(LIB_SUFFIX), nspr4 plds4 plc4))
+	$(RM) -f $(addprefix $(DESTDIR)$(bindir)/,nspr-config compile-et.pl prerr.properties)
+endif
+ifdef MOZ_LDAP_XPCOM
+	$(MAKE) -C directory/c-sdk real_install DESTDIR=$(DESTDIR) libdir=$(mozappdir) includedir=$(includedir)/ldap
+endif
+
 endif
 
 include $(topsrcdir)/config/rules.mk

allmakefiles.sh

@@ -47,7 +47,6 @@ add_makefiles "
 Makefile
 build/Makefile
 build/unix/Makefile
-build/unix/mozilla-config
 config/Makefile
 config/autoconf.mk
 config/mkdepend/Makefile

configure.in

@@ -4588,19 +4588,6 @@ if test -z "$MOZ_NATIVE_NSPR"; then
     rm -f config/autoconf.mk.bak
 fi
 
-# Hack to make sure that mozilla-config has the proper nspr dependencies
-if test -z "$MOZ_NATIVE_NSPR"; then
-    FULL_NSPR_CFLAGS=`./nsprpub/config/nspr-config --cflags`
-    FULL_NSPR_LIBS=`./nsprpub/config/nspr-config --libs`
-else
-    FULL_NSPR_CFLAGS=`${NSPR_CONFIG} --cflags`
-    FULL_NSPR_LIBS=`${NSPR_CONFIG} --libs`
-fi
-mv build/unix/mozilla-config build/unix/mozilla-config.bak
-cat build/unix/mozilla-config.bak | sed -e "s|@FULL_NSPR_LIBS@|${FULL_NSPR_LIBS}|" -e "s|@FULL_NSPR_CFLAGS@|${FULL_NSPR_CFLAGS}|" > build/unix/mozilla-config
-rm -f build/unix/mozilla-config.bak
-
-
 # if we're building the LDAP XPCOM component, we need to build 
 # the c-sdk first.  
 #