gcc: add missing patches to 15.1.0

toolchain/gcc/patches/15.1.0/add-crtreloc.frv

@@ -0,0 +1,12 @@
+diff -Nur gcc-8.3.0.orig/gcc/config/frv/linux.h gcc-8.3.0/gcc/config/frv/linux.h
+--- gcc-8.3.0.orig/gcc/config/frv/linux.h	2018-01-03 11:03:58.000000000 +0100
++++ gcc-8.3.0/gcc/config/frv/linux.h	2019-10-08 10:52:00.176295821 +0200
+@@ -27,7 +27,7 @@
+ 
+ #undef STARTFILE_SPEC
+ #define STARTFILE_SPEC \
+-  "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
++  "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} crtreloc.o%s \
+    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
+ 
+ #undef ENDFILE_SPEC

toolchain/gcc/patches/15.1.0/csky.patch

@@ -0,0 +1,12 @@
+diff -Nur gcc-11.2.0.orig/libgcc/config/csky/linux-atomic.c gcc-11.2.0/libgcc/config/csky/linux-atomic.c
+--- gcc-11.2.0.orig/libgcc/config/csky/linux-atomic.c	2021-07-28 08:55:08.760307899 +0200
++++ gcc-11.2.0/libgcc/config/csky/linux-atomic.c	2021-12-14 14:19:23.685729233 +0100
+@@ -24,7 +24,7 @@
+    <http://www.gnu.org/licenses/>.	 */
+ 
+ /* Kernel helper for compare-and-exchange.  */
+-inline int
++int
+ __kernel_cmpxchg (int oldval, int newval, volatile int *ptr)
+ {
+   register int _a0 asm ("a0") = oldval;

toolchain/gcc/patches/15.1.0/libgcc-fdpic-bfin.patch

@@ -0,0 +1,12 @@
+diff -Nur gcc-14.2.0.orig/libgcc/unwind-pe.h gcc-14.2.0/libgcc/unwind-pe.h
+--- gcc-14.2.0.orig/libgcc/unwind-pe.h	2024-08-01 10:17:17.000000000 +0200
++++ gcc-14.2.0/libgcc/unwind-pe.h	2025-03-10 10:40:25.191585648 +0100
+@@ -264,7 +264,7 @@
+ 
+       if (result != 0)
+ 	{
+-#if __FDPIC__
++#if defined(__FDPIC__) && !defined(__BFIN_FDPIC__)
+ 	  /* FDPIC relative addresses imply taking the GOT address
+ 	     into account.  */
+ 	  if ((encoding & DW_EH_PE_pcrel) && (encoding & DW_EH_PE_indirect))