ODR warning for "struct find_targ_sec_arg"

"struct find_targ_sec_arg" is defined in multiple .c files, causing
ODR warnings.  This patch renames the types.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=22395

gdb/coffread.c

diff --git a/gdb/coffread.c b/gdb/coffread.c
index 75cf646..474a1aa 100644
--- a/gdb/coffread.c
+++ b/gdb/coffread.c
@@ -254,7 +254,7 @@ coff_locate_sections (bfd *abfd, asection *sectp, void *csip)
 /* Return the section_offsets* that CS points to.  */
 static int cs_to_section (struct coff_symbol *, struct objfile *);
 
-struct find_targ_sec_arg
+struct coff_find_targ_sec_arg
   {
     int targ_index;
     asection **resultp;
@@ -263,7 +263,7 @@ struct find_targ_sec_arg
 static void
 find_targ_sec (bfd *abfd, asection *sect, void *obj)
 {
-  struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
+  struct coff_find_targ_sec_arg *args = (struct coff_find_targ_sec_arg *) obj;
 
   if (sect->target_index == args->targ_index)
     *args->resultp = sect;
@@ -274,7 +274,7 @@ static struct bfd_section*
 cs_to_bfd_section (struct coff_symbol *cs, struct objfile *objfile)
 {
   asection *sect = NULL;
-  struct find_targ_sec_arg args;
+  struct coff_find_targ_sec_arg args;
 
   args.targ_index = cs->c_secnum;
   args.resultp = §
@@ -301,7 +301,7 @@ static CORE_ADDR
 cs_section_address (struct coff_symbol *cs, bfd *abfd)
 {
   asection *sect = NULL;
-  struct find_targ_sec_arg args;
+  struct coff_find_targ_sec_arg args;
   CORE_ADDR addr = 0;
 
   args.targ_index = cs->c_secnum;

gdb/xcoffread.c

diff --git a/gdb/xcoffread.c b/gdb/xcoffread.c
index 9adc841..250bd9f 100644
--- a/gdb/xcoffread.c
+++ b/gdb/xcoffread.c
@@ -249,7 +249,7 @@ static void process_linenos (CORE_ADDR, CORE_ADDR);
 static int secnum_to_section (int, struct objfile *);
 static asection *secnum_to_bfd_section (int, struct objfile *);
 
-struct find_targ_sec_arg
+struct xcoff_find_targ_sec_arg
   {
     int targ_index;
     int *resultp;
@@ -262,7 +262,8 @@ static void find_targ_sec (bfd *, asection *, void *);
 static void
 find_targ_sec (bfd *abfd, asection *sect, void *obj)
 {
-  struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
+  struct xcoff_find_targ_sec_arg *args
+    = (struct xcoff_find_targ_sec_arg *) obj;
   struct objfile *objfile = args->objfile;
 
   if (sect->target_index == args->targ_index)
@@ -290,7 +291,7 @@ static void
 xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
 			  asection **bfd_sect, int *secnum)
 {
-  struct find_targ_sec_arg args;
+  struct xcoff_find_targ_sec_arg args;
 
   args.targ_index = n_scnum;
   args.resultp = secnum;