toolchain/gcc: Add GCC 10.1.0 patches

Compared to GCC 9:

870-ppc_no_crtsavres.patch changes moved to another file following upstream
881-no_tm_section.patch keep the tm section disabled

patches refreshed to apply cleanly

See https://gcc.gnu.org/gcc-10/porting_to.html for more info

Compiled and run tested on x86_64

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

toolchain/gcc/patches/10.1.0/820-libgcc_pic.patch

@@ -8,7 +8,7 @@ Date:   Mon Oct 19 23:26:09 2009 +0000
 
 --- a/libgcc/Makefile.in
 +++ b/libgcc/Makefile.in
-@@ -927,11 +927,12 @@ $(libgcov-driver-objects): %$(objext): $
+@@ -929,11 +929,12 @@ $(libgcov-driver-objects): %$(objext): $
  
  # Static libraries.
  libgcc.a: $(libgcc-objects)
@@ -22,7 +22,7 @@ Date:   Mon Oct 19 23:26:09 2009 +0000
  	-rm -f $@
  
  	objects="$(objects)";					\
-@@ -955,7 +956,7 @@ all: libunwind.a
+@@ -957,7 +958,7 @@ all: libunwind.a
  endif
  
  ifeq ($(enable_shared),yes)
@@ -31,7 +31,7 @@ Date:   Mon Oct 19 23:26:09 2009 +0000
  ifneq ($(LIBUNWIND),)
  all: libunwind$(SHLIB_EXT)
  libgcc_s$(SHLIB_EXT): libunwind$(SHLIB_EXT)
-@@ -1161,6 +1162,10 @@ install-shared:
+@@ -1163,6 +1164,10 @@ install-shared:
  	chmod 644 $(DESTDIR)$(inst_libdir)/libgcc_eh.a
  	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcc_eh.a