[COMMITTED] Add include to inline __copysign.

[Wilco Dijkstra]

Add a few missing includes of math_private.h to ensure that __copysign is inlined.

Commited as trivial patch in 5be9..e6e6.

ChangeLog: 
2015-05-20  Wilco Dijkstra  <wdijkstr@arm.com>

        * math/s_cproj.c: Add include "math_private.h".
        * math/s_cprojf.c: Likewise.
        * math/s_cprojl.c: Likewise.

---
 math/s_cproj.c  | 1 +
 math/s_cprojf.c | 1 +
 math/s_cprojl.c | 1 +
 3 files changed, 3 insertions(+)

diff --git a/math/s_cproj.c b/math/s_cproj.c
index 80615a6..bf2cfc4 100644
--- a/math/s_cproj.c
+++ b/math/s_cproj.c
@@ -19,6 +19,7 @@
 
 #include <complex.h>
 #include <math.h>
+#include <math_private.h>
 
 
 __complex__ double
diff --git a/math/s_cprojf.c b/math/s_cprojf.c
index 39542b2..531d10e 100644
--- a/math/s_cprojf.c
+++ b/math/s_cprojf.c
@@ -19,6 +19,7 @@
 
 #include <complex.h>
 #include <math.h>
+#include <math_private.h>
 
 
 __complex__ float
diff --git a/math/s_cprojl.c b/math/s_cprojl.c
index dc5a038..32292a4 100644
--- a/math/s_cprojl.c
+++ b/math/s_cprojl.c
@@ -19,6 +19,7 @@
 
 #include <complex.h>
 #include <math.h>
+#include <math_private.h>
 
 
 __complex__ long double
-- 
1.9.1