gnu: GRUB: Adjust to recent binutils changes.

* gnu/packages/patches/grub-binutils-compat.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/bootloaders.scm (grub)[source](patches): Add it.

gnu/local.mk

@@ -771,6 +771,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/grep-timing-sensitive-test.patch		\
   %D%/packages/patches/groff-source-date-epoch.patch		\
   %D%/packages/patches/groovy-add-exceptionutilsgenerator.patch	\
+  %D%/packages/patches/grub-binutils-compat.patch		\
   %D%/packages/patches/grub-check-error-efibootmgr.patch	\
   %D%/packages/patches/gsl-test-i686.patch			\
   %D%/packages/patches/gspell-dash-test.patch			\

gnu/packages/bootloaders.scm

@@ -86,7 +86,8 @@
              (sha256
               (base32
                "03vvdfhdmf16121v7xs8is2krwnv15wpkhkf16a4yf8nsfc3f2w1"))
-             (patches (search-patches "grub-check-error-efibootmgr.patch"))))
+             (patches (search-patches "grub-check-error-efibootmgr.patch"
+                                      "grub-binutils-compat.patch"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases (modify-phases %standard-phases

gnu/packages/patches/grub-binutils-compat.patch

@@ -0,0 +1,53 @@
+Fix a relocation issue that shows up with recent binutils.
+
+Patch taken from upstream:
+https://git.sv.gnu.org/cgit/grub.git/commit/?id=842c390469e2c2e10b5aa36700324cd3bde25875
+
+diff --git a/grub-core/efiemu/i386/loadcore64.c b/grub-core/efiemu/i386/loadcore64.c
+index e49d0b6..18facf4 100644
+--- a/grub-core/efiemu/i386/loadcore64.c
++++ b/grub-core/efiemu/i386/loadcore64.c
+@@ -98,6 +98,7 @@ grub_arch_efiemu_relocate_symbols64 (grub_efiemu_segment_t segs,
+ 		    break;
+ 
+ 		  case R_X86_64_PC32:
++		  case R_X86_64_PLT32:
+ 		    err = grub_efiemu_write_value (addr,
+ 						   *addr32 + rel->r_addend
+ 						   + sym.off
+diff --git a/grub-core/kern/x86_64/dl.c b/grub-core/kern/x86_64/dl.c
+index 4406906..3a73e6e 100644
+--- a/grub-core/kern/x86_64/dl.c
++++ b/grub-core/kern/x86_64/dl.c
+@@ -70,6 +70,7 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
+ 	  break;
+ 
+ 	case R_X86_64_PC32:
++	case R_X86_64_PLT32:
+ 	  {
+ 	    grub_int64_t value;
+ 	    value = ((grub_int32_t) *addr32) + rel->r_addend + sym->st_value -
+diff --git a/util/grub-mkimagexx.c b/util/grub-mkimagexx.c
+index a2bb054..39d7efb 100644
+--- a/util/grub-mkimagexx.c
++++ b/util/grub-mkimagexx.c
+@@ -841,6 +841,7 @@ SUFFIX (relocate_addresses) (Elf_Ehdr *e, Elf_Shdr *sections,
+ 		  break;
+ 
+ 		case R_X86_64_PC32:
++		case R_X86_64_PLT32:
+ 		  {
+ 		    grub_uint32_t *t32 = (grub_uint32_t *) target;
+ 		    *t32 = grub_host_to_target64 (grub_target_to_host32 (*t32)
+diff --git a/util/grub-module-verifier.c b/util/grub-module-verifier.c
+index 9179285..a79271f 100644
+--- a/util/grub-module-verifier.c
++++ b/util/grub-module-verifier.c
+@@ -19,6 +19,7 @@ struct grub_module_verifier_arch archs[] = {
+       -1
+     }, (int[]){
+       R_X86_64_PC32,
++      R_X86_64_PLT32,
+       -1
+     }
+   },