powerpc64-ld infinite loop

If this code dealing with possible conversion of inline plt sequences
is ever executed, ld will hang.  A binary with such sequences and of
code size larger than approximately 90% the reach of an unconditional
branch is the trigger.  Oops.

	* elf64-ppc.c (ppc64_elf_inline_plt): Do increment rel in for loop.

(cherry picked from commit 435edf0bf231240ccecb474b74ebb49dc8db2633)

bfd/ChangeLog

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 88a6914..77ed3e0 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2020-03-11  Alan Modra  <amodra@gmail.com>
+
+	* elf64-ppc.c (ppc64_elf_inline_plt): Do increment rel in for loop.
+
 2020-01-15  Alan Modra  <amodra@gmail.com>
 
 	PR 25384

bfd/elf64-ppc.c

diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index 9ced4f8..83832f3 100644
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -7158,7 +7158,7 @@
 	      return FALSE;
 
 	    relend = relstart + sec->reloc_count;
-	    for (rel = relstart; rel < relend; )
+	    for (rel = relstart; rel < relend; rel++)
 	      {
 		enum elf_ppc64_reloc_type r_type;
 		unsigned long r_symndx;