level up boost to version 0.46

- remove dedicated bjam-package since its maintaincene seems to only happen inside the boost tree now
 - remove not anymore required patches
 - add patch to remove hardcoded linker flags from jam file and move them into the OpenWrt Makefile (-pthreads -lrt)
 - remove package boost-function_types

git-svn-id: svn://svn.openwrt.org/openwrt/packages@29189 3c298f89-4303-0410-b956-a3cf2f4a3e73

libs/boost/patches/100-do-not-use-librt.patch

@@ -0,0 +1,27 @@
+diff -ruN boost_1_48_0.orig/tools/build/v2/tools/gcc.jam boost_1_48_0/tools/build/v2/tools/gcc.jam
+--- boost_1_48_0.orig/tools/build/v2/tools/gcc.jam	2011-06-06 22:36:21.000000000 +0200
++++ boost_1_48_0/tools/build/v2/tools/gcc.jam	2011-11-16 13:15:49.071254804 +0100
+@@ -1063,8 +1063,7 @@
+             }
+             case * :
+             {
+-                option = -pthread ;
+-                libs = rt ;
++                # pass appropriate options via OpenWrt
+             }
+         }
+     
+diff -ruN boost_1_48_0.orig/tools/build/v2/tools/gcc.py boost_1_48_0/tools/build/v2/tools/gcc.py
+--- boost_1_48_0.orig/tools/build/v2/tools/gcc.py	2011-01-25 19:06:12.000000000 +0100
++++ boost_1_48_0/tools/build/v2/tools/gcc.py	2011-11-16 13:16:12.601254423 +0100
+@@ -685,8 +685,8 @@
+         # Darwin has no threading options, don't set anything here.
+         pass
+     else:
+-        flags('gcc', 'OPTIONS', ['<threading>multi'], ['-pthread'])
+-        flags('gcc', 'FINDLIBS-SA', [], ['rt'])
++        # pass appropriate options via OpenWrt
++        pass
+ 
+ def cpu_flags(toolset, variable, architecture, instruction_set, values, default=None):
+     #FIXME: for some reason this fails.  Probably out of date feature code