[PATCH] Fix symbols truncation for i386pep target

[Frediano Ziglio]

In case the symbols are between 15 and 18 characters it gets
truncated.
This is due to a mismatch in type declaration allocating only
14 bytes for x_fname field.
This can be easy verified with these commands

  $ echo 'int main(void) {}' > 15_characters.c
  $ gcc -c 15_characters.c
  $ ld -mi386pep 15_characters.o
  ld: a.exe:.comment: section below image base
  $ objdump -t a.exe | grep 103
  [  0](sec -2)(fl 0x00)(ty    0)(scl 103) (nx 1) 0x0000000000000002
15_characters.

Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com>
---
 include/coff/x86_64.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/coff/x86_64.h b/include/coff/x86_64.h
index 13857a8d569..1a146c26129 100644
--- a/include/coff/x86_64.h
+++ b/include/coff/x86_64.h
@@ -23,6 +23,11 @@
 #ifndef COFF_X86_64_H
 #define COFF_X86_64_H

+#ifdef E_FILNMLEN
+#error E_FILNMLEN already defined!
+#endif
+#define E_FILNMLEN      18      /* # characters in a file name.  */
+
 #include "coff/x86.h"

 #define AMD64MAGIC 0x8664
-- 
2.50.1