Fix #1530448 - fix ctypes build failure on solaris 10.

The '-mimpure-text' linker flag is required when linking _ctypes.so.
diff --git a/Misc/NEWS b/Misc/NEWS
index a6797f4..d4eb218 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -48,6 +48,8 @@
 Build
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+- Bug #1530448, ctypes buld failure on Solaris 10 was fixed.
+
 
 Mac
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