Fix OpenEXR C++ version requirement

- Remove -std=c++98 from OpenEXR's CFLAGS, it now requires at least C++ 11.

Change-Id: I5778b4b77c2186df91512e7d35c2fac009d26ea6
diff --git a/debian/patches/02_openexr.patch b/debian/patches/02_openexr.patch
new file mode 100644
index 0000000..e503adb
--- /dev/null
+++ b/debian/patches/02_openexr.patch
@@ -0,0 +1,13 @@
+diff --git a/ext/openexr/Makefile.am b/ext/openexr/Makefile.am
+index 1a95fee6..137850f8 100644
+--- a/ext/openexr/Makefile.am
++++ b/ext/openexr/Makefile.am
+@@ -6,7 +6,7 @@ libgstopenexr_la_CFLAGS = \
+ 	$(OPENEXR_CFLAGS)
+ libgstopenexr_la_CXXFLAGS = \
+ 	$(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CXXFLAGS) \
+-	$(OPENEXR_CFLAGS) -std=c++98
++	$(OPENEXR_CFLAGS)
+ libgstopenexr_la_LIBADD = \
+ 	$(GST_PLUGINS_BASE_LIBS) -lgstvideo-$(GST_API_VERSION) \
+ 	$(GST_BASE_LIBS) $(GST_LIBS) $(OPENEXR_LIBS)
diff --git a/debian/patches/series b/debian/patches/series
index 6d1fff2..b1d8e58 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1 +1,2 @@
 01_fix-modplug-linking.patch
+02_openexr.patch