graphics/openshadinglanguage: update to 1.11.15.0 release

Changelog:
* oslc/OSLCompiler: Check for errors when when writing oso (for example, disk volume full).
* Fix crash generating closure function calls with LLVM 11.
* Build: LLVM 12 compatibility.
* Build: Support for CMake 3.20
* Build: Be robust to certain OpenEXR 2.x config fies.
* Build: Fixes to deal with newer OIIO builds that are C++14.
* Fix library setup for LLVM installations consisting of static libraries.
* Fix warnings that occur when compiling with clang and C++17 mode.
* CI/testing: Additional CI tests for clang+c++17, gcc11, llvm 12, speed up CI builds by not building the testing components of OIIO.
* Changes for compatibility with OpenImageIO 2.3.
* Fix potential crashes (or at least undefined behavior) due to missing virtual destructor of internal Symbol type.

graphics/openshadinglanguage/Makefile

@@ -2,8 +2,7 @@
 
 PORTNAME=	openshadinglanguage
 DISTVERSIONPREFIX=	Release-
-DISTVERSION=	1.11.13.0
-PORTREVISION=	4
+DISTVERSION=	1.11.15.0
 CATEGORIES=	graphics devel
 
 MAINTAINER=	FreeBSD@Shaneware.biz

graphics/openshadinglanguage/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1618078392
-SHA256 (imageworks-OpenShadingLanguage-Release-1.11.13.0_GH0.tar.gz) = de192571b1b0cb182f108832a9d2acf5682f46248ed3ecc0464d787ccfc097cf
-SIZE (imageworks-OpenShadingLanguage-Release-1.11.13.0_GH0.tar.gz) = 14142105
+TIMESTAMP = 1631387445
+SHA256 (imageworks-OpenShadingLanguage-Release-1.11.15.0_GH0.tar.gz) = a10baa2455405f0a6488a915645dd3d006b8471bae6c269796ba5ba6ce863cbc
+SIZE (imageworks-OpenShadingLanguage-Release-1.11.15.0_GH0.tar.gz) = 14143372