[pushed] Include objfiles.h in a few .c files

[Tom Tromey]

I found a few .c files that rely on objfiles.h, but that only include
it indirectly, via dwarf2/read.h -> psympriv.h.  If that include is
removed (something my new DWARF indexer series does), then the build
will break.

It seemed harmless and correct to add these includes now, making the
eventual series a little smaller.
---
 gdb/compile/compile-loc2c.c | 1 +
 gdb/dwarf2/expr.c           | 1 +
 gdb/dwarf2/macro.c          | 1 +
 3 files changed, 3 insertions(+)

diff --git a/gdb/compile/compile-loc2c.c b/gdb/compile/compile-loc2c.c
index ef819799eb4..fb1a4ff02b6 100644
--- a/gdb/compile/compile-loc2c.c
+++ b/gdb/compile/compile-loc2c.c
@@ -19,6 +19,7 @@
 
 #include "defs.h"
 #include "dwarf2.h"
+#include "objfiles.h"
 #include "dwarf2/expr.h"
 #include "dwarf2/loc.h"
 #include "dwarf2/read.h"
diff --git a/gdb/dwarf2/expr.c b/gdb/dwarf2/expr.c
index 9e5a3566d61..cc1a72d7cd1 100644
--- a/gdb/dwarf2/expr.c
+++ b/gdb/dwarf2/expr.c
@@ -32,6 +32,7 @@
 #include "frame.h"
 #include "gdbsupport/underlying.h"
 #include "gdbarch.h"
+#include "objfiles.h"
 
 /* Cookie for gdbarch data.  */
 
diff --git a/gdb/dwarf2/macro.c b/gdb/dwarf2/macro.c
index 082c4e9672a..86f7bd79cb2 100644
--- a/gdb/dwarf2/macro.c
+++ b/gdb/dwarf2/macro.c
@@ -35,6 +35,7 @@
 #include "buildsym.h"
 #include "macrotab.h"
 #include "complaints.h"
+#include "objfiles.h"
 
 static void
 dwarf2_macro_malformed_definition_complaint (const char *arg1)
-- 
2.31.1