gcc-4.6: Switch to using svn SRC_URI for recipe

We call the recipes 4.6
Remove the backport patches

(From OE-Core rev: 68b545f4ff719f2b6e57d68b002dc9845c7a14ae)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gcc/gcc-4.6/64bithack.patch

@@ -0,0 +1,35 @@
+Upstream-Status: Inappropriate [embedded specific]
+
+By default gcc places 64 bit libs in a lib64 directory. This makes it use 
+"lib" instead.
+
+RP 25/7/10
+
+Index: gcc-4.6.0/gcc/config/i386/t-linux64
+===================================================================
+--- gcc-4.6.0.orig/gcc/config/i386/t-linux64
++++ gcc-4.6.0/gcc/config/i386/t-linux64
+@@ -24,8 +24,8 @@
+ # MULTILIB_OSDIRNAMES according to what is found on the target.
+ 
+ MULTILIB_OPTIONS = m64/m32
+-MULTILIB_DIRNAMES = 64 32 
+-MULTILIB_OSDIRNAMES = ../lib64 $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)
++MULTILIB_DIRNAMES = . 32
++MULTILIB_OSDIRNAMES = . $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)
+ 
+ LIBGCC = stmp-multilib
+ INSTALL_LIBGCC = install-multilib
+Index: gcc-4.6.0/gcc/config/i386/linux64.h
+===================================================================
+--- gcc-4.6.0.orig/gcc/config/i386/linux64.h
++++ gcc-4.6.0/gcc/config/i386/linux64.h
+@@ -63,7 +63,7 @@ see the files COPYING3 and COPYING.RUNTI
+    done.  */
+ 
+ #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
+-#define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux-x86-64.so.2"
++#define GLIBC_DYNAMIC_LINKER64 "/lib/ld-linux-x86-64.so.2"
+ 
+ #if TARGET_64BIT_DEFAULT
+ #define SPEC_32 "m32"