Use more uniform style of including headers.

Put external headers before internal ones. While there, replace a lot of
occurences of "openlibm.h" with <openlibm.h>. It should be thought of as
an external header, as it is installed along with the library.

Author: EdSchouten

amd64/fenv.c

@@ -32,7 +32,7 @@
 #ifdef _WIN32
 #define __fenv_static
 #endif
-#include "openlibm_fenv.h"
+#include <openlibm_fenv.h>
 
 #ifdef __GNUC_GNU_INLINE__
 #error "This file must be compiled with C99 'inline' semantics"

ld128/e_rem_pio2l.h

@@ -23,8 +23,8 @@
  */
 
 #include <float.h>
+#include <openlibm.h>
 
-#include "openlibm.h"
 #include "math_private.h"
 #include "fpmath.h"
 

ld128/k_tanl.c

@@ -18,7 +18,8 @@
  * ld128 version of k_tan.c.  See ../src/k_tan.c for most comments.
  */
 
-#include "openlibm.h"
+#include <openlibm.h>
+
 #include "math_private.h"
 
 /*

ld128/s_exp2l.c

@@ -28,10 +28,10 @@
 //__FBSDID("$FreeBSD: src/lib/msun/ld128/s_exp2l.c,v 1.3 2008/02/13 10:44:44 bde Exp $");
 
 #include <float.h>
+#include <openlibm.h>
 #include <stdint.h>
 
 #include "fpmath.h"
-#include "openlibm.h"
 #include "math_private.h"
 
 #define	TBLBITS	7

ld128/s_nanl.c

@@ -26,7 +26,7 @@
  * $FreeBSD: src/lib/msun/ld128/s_nanl.c,v 1.3 2008/03/02 20:16:55 das Exp $
  */
 
-#include "openlibm.h"
+#include <openlibm.h>
 
 #include "fpmath.h"
 #include "math_private.h"

ld80/e_coshl.c

@@ -31,7 +31,8 @@
  *	only coshl(0)=1 is exact for finite x.
  */
 
-#include "openlibm.h"
+#include <openlibm.h>
+
 #include "math_private.h"
 
 static const long double one = 1.0, half=0.5, huge = 1.0e4900L;

ld80/e_rem_pio2l.h

@@ -23,10 +23,9 @@
  */
 
 #include <float.h>
+#include <openlibm.h>
 
-#include "openlibm.h"
 #include "math_private.h"
-#include "openlibm.h"
 
 #define	BIAS	(LDBL_MAX_EXP - 1)
 

ld80/k_tanl.c

@@ -18,7 +18,8 @@
  * ld80 version of k_tan.c.  See ../src/k_tan.c for most comments.
  */
 
-#include "openlibm.h"
+#include <openlibm.h>
+
 #include "math_private.h"
 
 /*

ld80/s_exp2l.c

@@ -32,8 +32,8 @@
 
 #include "amd64/bsd_ieeefp.h"
 
-#include "openlibm.h"
-#include "openlibm.h"
+#include <openlibm.h>
+
 #include "math_private.h"
 
 #define	TBLBITS	7

ld80/s_nanl.c

@@ -26,9 +26,8 @@
  * $FreeBSD: src/lib/msun/ld80/s_nanl.c,v 1.2 2007/12/18 23:46:31 das Exp $
  */
 
-#include "openlibm.h"
+#include <openlibm.h>
 
-#include "openlibm.h"
 #include "math_private.h"
 
 DLLEXPORT long double