[llvm] [BOLT] Fix order of R_*_IRELATIVE in .rela.plt (PR #106515)

[via llvm-commits]

linsinan1995 wrote:

The testcase is generated from bolt/test/runtime/iplt.c with gnu-ld

```
#include "../Inputs/stub.h"

static void foo() { int i = rand(); printf("%d", i); }

static void *resolver_foo(void) { return foo; }

__attribute__((ifunc("resolver_foo"))) void ifoo();

static void *resolver_memcpy(void) { return memcpy; }

__attribute__((ifunc("resolver_memcpy"))) void *
imemcpy(void *dest, const void *src, unsigned long n);

int main() {
  int a = 0xdeadbeef, b = 0;
  imemcpy(&b, &a, sizeof(b));
  if (a != b)
    return -1;

  ifoo();
}
```

with commands
clang -nostdlib  -fpic bolt/test/runtime/iplt.c -o iplt.o -Wl,-q  -nostdlib -nodefaultlibs -c
clang -nostdlib  -fpic bolt/test/Inputs/stub.c -o stub.o -Wl,-q  -nostdlib -nodefaultlibs -c
clang -nostdlib -fpic -shared stub.o -Wl,-q  -nostdlib -nodefaultlibs -o libstub.so
clang -nostdlib -fpic iplt.o  -Wl,-q  -nostdlib -nodefaultlibs -L. -lstub -o test
llvm-strip --strip-unneeded test -o test



https://github.com/llvm/llvm-project/pull/106515