gcc: Build gcc version 4.8.3, refresh patches from openwrt.git.

Signed-off-by: Christian Beier <dontmind@freeshell.org>

devel/gcc/patches/860-uclibc_use_eh_frame.patch

@@ -1,5 +1,5 @@
---- a/gcc/crtstuff.c
-+++ b/gcc/crtstuff.c
+--- a/libgcc/crtstuff.c
++++ b/libgcc/crtstuff.c
 @@ -100,15 +100,20 @@ call_ ## FUNC (void)					\
  #if defined(OBJECT_FORMAT_ELF) \
      && !defined(OBJECT_FORMAT_FLAT) \
@@ -26,4 +26,4 @@
 +#  endif
  # endif
  #endif
- #if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME)
+