gcc: upgrade from 4.5.0 to 4.5.1

Removed these patches which are not needed anymore.
  gcc-4.5.0_to_svn_162697.patch.bz2 : All the commits in this patch is
          part of the 4.5.1 branch. So moving to 4.5.1 makes this patch
          obsolete
  gcc_revert_base_version_to_4.5.0.patch: moving to 4.5.1 removes need
          of this patch
  gcc-pr43698-arm-rev-instr.patch: upstream has this fix.

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>

meta/recipes-devtools/gcc/gcc-4.5.1/64bithack.patch

@@ -0,0 +1,33 @@
+By default gcc places 64 bit libs in a lib64 directory. This makes it use 
+"lib" instead.
+
+RP 25/7/10
+
+Index: gcc-4.5.0/gcc/config/i386/t-linux64
+===================================================================
+--- gcc-4.5.0.orig/gcc/config/i386/t-linux64	2010-08-10 15:47:42.000000000 +0100
++++ gcc-4.5.0/gcc/config/i386/t-linux64	2010-08-10 15:47:47.000000000 +0100
+@@ -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-4.5.0/gcc/config/i386/linux64.h
+===================================================================
+--- gcc-4.5.0.orig/gcc/config/i386/linux64.h	2010-08-10 15:49:06.000000000 +0100
++++ gcc-4.5.0/gcc/config/i386/linux64.h	2010-08-10 15:49:16.000000000 +0100
+@@ -59,7 +59,7 @@
+    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"