i386: Fix strncmp last arguments in x86_64_elf_section_type_flags

Clearly I can't count, so we would consider as SECTION_BSS even sections
like .lbssfoo or .gnu.linkonce.lbbar, even when linker only considers as
special .lbss or .lbss.baz or .gnu.linkonce.lb.qux.

2020-02-10  Jakub Jelinek  <jakub@redhat.com>

	PR target/58218
	PR other/93641
	* config/i386/i386.c (x86_64_elf_section_type_flags): Fix up last
	arguments of strncmp.

gcc/ChangeLog

+2020-02-10  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/58218
+	PR other/93641
+	* config/i386/i386.c (x86_64_elf_section_type_flags): Fix up last
+	arguments of strncmp.
+
 2020-02-10  Feng Xue  <fxue@os.amperecomputing.com>
 
 	PR ipa/93203

gcc/config/i386/i386.c

@@ -751,8 +751,9 @@ x86_64_elf_section_type_flags (tree decl, const char *name, int reloc)
     flags |= SECTION_RELRO;
 
   if (strcmp (name, ".lbss") == 0
-      || strncmp (name, ".lbss.", 5) == 0
-      || strncmp (name, ".gnu.linkonce.lb.", 16) == 0)
+      || strncmp (name, ".lbss.", sizeof (".lbss.") - 1) == 0
+      || strncmp (name, ".gnu.linkonce.lb.",
+		  sizeof (".gnu.linkonce.lb.") - 1) == 0)
     flags |= SECTION_BSS;
 
   return flags;