add some links to todos

Author: nickdesaulniers

libc/src/setjmp/arm/longjmp.cpp

@@ -49,6 +49,8 @@ LLVM_LIBC_FUNCTION(void, longjmp, (__jmp_buf * buf, int val)) {
 
 #else // Thumb2 or ARM
 
+// TODO(https://github.com/llvm/llvm-project/issues/94061): fp registers (d0-d16)
+// TODO(https://github.com/llvm/llvm-project/issues/94062): pac+bti
 [[gnu::naked]]
 LLVM_LIBC_FUNCTION(void, longjmp, (__jmp_buf * buf, int val)) {
   asm(R"(

libc/src/setjmp/arm/setjmp.cpp

@@ -47,6 +47,8 @@ LLVM_LIBC_FUNCTION(int, setjmp, (__jmp_buf * buf)) {
 
 #else // Thumb2 or ARM
 
+// TODO(https://github.com/llvm/llvm-project/issues/94061): fp registers (d0-d16)
+// TODO(https://github.com/llvm/llvm-project/issues/94062): pac+bti
 [[gnu::naked]]
 LLVM_LIBC_FUNCTION(int, setjmp, (__jmp_buf * buf)) {
   asm(R"(