ilmbase: provide lib:s without version suffix.

* Style fixes for ilmbase and openexr.

media-libs/ilmbase/patches/ilmbase-2.2.0.patchset

@@ -1,4 +1,4 @@
-From 253c255d474d66d6a7c6807ce0deb4ada9022659 Mon Sep 17 00:00:00 2001
+From f698920dbb4857505d1943fbef3cc9f3d05a2bae Mon Sep 17 00:00:00 2001
 From: Kacper Kasper <kacperkasper@gmail.com>
 Date: Sat, 16 Dec 2017 10:52:53 +0100
 Subject: gcc2 support
@@ -16,18 +16,9 @@ index ce64b50..8deed8b 100644
      return 0;
  }
 diff --git a/Half/toFloat.cpp b/Half/toFloat.cpp
-index 001bc51..fd50b84 100644
+index 001bc51..ef2d87f 100644
 --- a/Half/toFloat.cpp
 +++ b/Half/toFloat.cpp
-@@ -135,7 +135,7 @@ int
- main ()
- {
-     cout.precision (9);
--    cout.setf (ios_base::hex, ios_base::basefield);
-+    cout.setf (ios::hex, ios::basefield);
- 
-     cout << "//\n"
- 	    "// This is an automatically generated file.\n"
 @@ -160,5 +160,6 @@ main ()
      }
  
@@ -62,27 +53,6 @@ index df2a3e5..c6ae73b 100644
  
  void setFpExceptionHandler (FpExceptionHandler handler);
  
-diff --git a/Imath/ImathMatrix.h b/Imath/ImathMatrix.h
-index 3e96c2f..533ad26 100644
---- a/Imath/ImathMatrix.h
-+++ b/Imath/ImathMatrix.h
-@@ -3242,6 +3242,8 @@ Matrix44<T>::shear (const Shear6<S> &h)
- // Implementation of stream output
- //--------------------------------
- 
-+#define ios_base ios
-+
- template <class T>
- std::ostream &
- operator << (std::ostream &s, const Matrix33<T> &m)
-@@ -3320,6 +3322,7 @@ operator << (std::ostream &s, const Matrix44<T> &m)
-     return s;
- }
- 
-+#undef ios_base
- 
- //---------------------------------------------------------------
- // Implementation of vector-times-matrix multiplication operators
 diff --git a/Imath/ImathVec.h b/Imath/ImathVec.h
 index fb859eb..5fa0e91 100644
 --- a/Imath/ImathVec.h